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Born: 25 July 1896, Clifton Road, Rugby, Warwickshire, England
Entered: 08 September 1913, St Stanislaus College, Tullabeg, County Offaly
Ordained: 31 July 1928, Milltown Park, Dublin
Final Vows: 15 August 1932
Died: 14 October 1982, Borgo Santo Spirito, Rome, Italy

Transcribed : HIB to ASL 05 April 1931

Father was a Surveyor in Custons & Excise and died in 1913. His mother died in 1907. After parents death his father had appointed his uncle D O’Connell of Eccles Street, Dublin and aunt Miss J Kelly as guardians.

Eldest of one sister and two brothers.

Early education initially and a private school and a convent school in London, he was sent to St Aloysius College, Hornsey Lane, Highgate, London for two years. In 1907-1908 he received private tuition in Leicester. He then got an Entrance Scholarship to St Flannan’s College in Ennis. In 1911 he went to Clongowes Wood College SJ

by 1921 at Valkenburg Netherlands (GER) studying
by 1924 in Australia - Regency

◆ Australian Dictionary of Biography, National Centre of Biography, Australian National University online :
O'Connell, Daniel Joseph Kelly (1896–1982)
by Nick Lomb
Nick Lomb, 'O'Connell, Daniel Joseph Kelly (1896–1982)', Australian Dictionary of Biography, National Centre of Biography, Australian National University, http://adb.anu.edu.au/biography/oconnell-daniel-joseph-kelly-15389/text26596, published first in hardcopy 2012

astronomer; Catholic priest; seismologist

Died : 14 October 1982, Rome, Italy

Daniel Joseph Kelly O’Connell (1896-1982), Jesuit priest, astronomer and seismologist, was born on 25 July 1896 at Rugby, England, one of four children of Irish-born Daniel O’Connell (d.1905), Inland Revenue officer, and his English wife Rosa Susannah Helena, née Kelly (d.1907). Soon after the death of his mother, Daniel was sent to Clongowes Wood College, Dublin. At 17 he joined the Society of Jesus at Tullabeg and in 1915 entered his juniorate at Rathfarnham Castle. He majored in experimental physics and mathematics at University College, Dublin (B.Sc., 1919; M.Sc., 1920; D.Sc., 1949, National University of Ireland). Subsequently he studied philosophy at St Ignatius’ College, Valkenburg, the Netherlands, where he began watching variable stars, especially eclipsing binaries that were to become the main focus of his astronomical research.

O’Connell planned to attend the University of Cambridge but, due to a lung condition, he was advised to leave Britain. In 1922 he arrived at St Ignatius’ College, Riverview, Sydney; he did his regency, taught physics and the next year became assistant-director at the college’s observatory. He returned to Ireland in 1926 to complete his theological studies at Milltown Park, Dublin. Ordained on 31 July 1928, he undertook his tertianship at St Bueno’s College, Wales. In 1931 he travelled to Cambridge, Massachusetts, United States of America, to study at the Harvard College Observatory with Harlow Shapley.

Back at Riverview Observatory in 1933, O’Connell became director in 1938. At the observatory his research included seismology and the measurement of time with various kinds of clocks, as well as astronomy in the field of variable stars using the newly developed technique of photographic photometry. In 1935 he was elected a fellow of the Royal Astronomical Society and a member of the Royal Society of New South Wales; he served on the RSNSW council (1946-49) and as vice-president (1950-52), and became an honorary member in 1953. He was chairman from 1946 of the board of visitors of Sydney Observatory. One of the friendships he established while in Australia was with (Sir) Richard Woolley, director of Mount Stromlo Observatory. O’Connell presented radio talks, including a series of three titled ‘According to Hoyle’ on the Australian Broadcasting Commission station 2BL-2NC in March and April 1952.

That year O’Connell was called to Rome as director of the Vatican Observatory. On 26 July he left Australia, arriving in time for the Rome meeting of the International Astronomical Union. He continued his work on eclipsing binary stars, again using photoelectric photometry. A leading expert in the field, he was president (1955-61) of the commission on photometric double stars of the IAU. He published The Green Flash and Other Low Sun Phenomena (1958), which included colour photographs proving that the phenomenon, sometimes seen at sunrise or sunset, was real and not subjective.

At the Vatican Observatory O’Connell built up the staff and installed a 60/90-cm Schmidt telescope that became the observatory’s largest instrument. As objective prisms were available, the telescope was used for spectroscopy. With leading scientists he organised two study weeks—one on stellar populations in 1957 and another on nuclei of galaxies in 1970—and published the proceedings. He had personal friendships with three popes, especially Pope Pius XII. In 1970 he retired from his observatory post but continued as president (1968-72) of the Pontifical Academy of Sciences.

O’Connell died on 14 October 1982 at the headquarters of the Society of Jesus in Rome. He is remembered mainly for his work on eclipsing binary stars and the ‘O’Connell effect’ that relates to the rotation of the major axis of the elliptical orbit of a double star.

Select Bibliography
D. Strong, The Australian Dictionary of Jesuit Biography 1848-1998 (1999)
Irish Astronomical Journal, vol 15, no 4, 1982, p 347
D. O’Connell personal file (Society of Jesus, Australian Province Archives, Melbourne)

◆ David Strong SJ “The Australian Dictionary of Jesuit Biography 1848-2015”, 2nd Edition, Halstead Press, Ultimo NSW, Australia, 2017 - ISBN : 9781925043280
Daniel O'Connell's secondary education was at Clongowes College, Dublin. He entered the Society at Tullabeg, Ireland, 8 September 1913, and juniorate followed at Rathfarnham, 1915-20. He received his diploma in experimental physics and a Master of Science in mathematics at the University of Dublin, and later a doctorate in science from the Irish National University At this time he came under the influence of William O'Leary, the Irish Jesuit astronomer and seismologist, who at that time was director of Rathfarnham Castle Observatory in Dublin.
O’Connell then studied philosophy at Valkenburg, 1920-22, and did further tertiary studies in science, gaining first class honours in most subjects. It was while in Holland that he also pursued spare time astronomical studies under world famous Jesuit scientists like Michael Esch, expert on variable stars, Xavier Kugler, world authority on Assyriology and Babylonian astronomy; and Theodor Wulf world ranking physicist.
Regency followed as assistant director of the Riverview observatory, 1922-26, as well as physics master and second division prefect. At this time he undertook to advance the local study of solar radiation.
He went to theology at Milltown Park, Dublin 1926-29, and to tertianship at St Beuno's, Wales.
O'Connell studied from 1931-33 at Harvard College Observatory, Cambridge, Massachusetts, and was subsequently to have studied with the famous Sir Arthur Eddington. However, because of a lung condition, he returned to Australia, and then worked first as assistant director and later as director of the Riverview observatory 1933-52. Then he was appointed moderator of the Vatican Observatory at Castel Gandolfo, Rome, 1953-70. He lived in the Jesuit Curia, Rome, and from 1974 was due president emeritus of the Pontifical Academy of Sciences.
During the years that O'Connell was at Harvard, the observatory was at the centre of major developments in astronomical research and especially those that were to lead within
the next few decades to the notion of the expanding universe of galaxies. He was thus associated with such eminent astronomers as Harlow Shapley, Cecilia Payne Gaposhkin, and others. His principal occupation at Harvard, and a pursuit which continued for the rest of his life, was the study of variable stars; but he also became known as a keen card player, especially bridge.
On his way back to Australia he visited Mount Wilson and Lick observatories in California, and then went to Japan, China, Java and the Philippines, where he visited leading observatories and advanced his practical studies.
While at the Riverview Observatory, working under William O'Leary, and in addition to his study of variable stars, he developed a keen interest in seismology and in the measurement of time with various types of clocks. This latter focus led him into a lifelong interest in the calendar and calendar reform, a study that served him well in later decades since he was asked to advise popes on both calendar reform and the cycle of ecclesiastical feasts.
In 1935 he initiated the “Riverview Observatory Publications” which enjoyed international reputation. Later, he founded the “Reprint Series” and the “Geophysical Papers” that became also well known. In the field of astronomy, O'Connell worked on eclipsing stars and Cepheid variables For the latter he used photo-electric equipment. About 15 ,000 plates on variable stars were on file at the observatory.
In the field of seismology the observatory's programme included the regional study of earthquake waves and the relationship between earthquake waves and the interior of the earth
During World War II, O'Connell collaborated with the United States government in the location of earthquakes in the Pacific zone in relation to war strategy. This work continued after the war. Each week a cabled report was sent to the United States from Riverview. The Imperial War Graves Commission also consulted him concerning possible earthquake damage to war cemetery sites in the Pacific area.
In his role as director of the Vatican Observatory, he began a career of unique service to the Church that spanned the reign of three popes, and saw immense developments in astronomical research from the initial concept of various stellar populations to an expanding universe containing active galactic nuclei and quasars. On a few occasions he organised study weeks of the Pontifical Academy of Sciences, at which these subjects were discussed, e.g. Stellar Populations in 1957, and Nuclei of Galaxies in 1970. As a result of these study weeks, two books were published, both edited by O'Connell, and they became classics of astronomical literature. From 1955-61 he was president of the Commission on Double Stars of the International Astronomical Union.
Of his many contacts with popes he served, his relationship with Pius XII was especially close. He frequently advised the Pope, himself a very keen and diligent student of the natural sciences, on topics of current scientific research. In was under Pius XII that the major modern research tool of the Vatican Observatory, the Schmidt telescope, planned under his predecessors but completed under O'Connell, was inaugurated and blessed. Pius XII often visited the observatory, and on one occasion viewed the launching of the Russian Sputnik.
Paul VI viewed the landing of the first man on the Moon with O'Connell over a specially installed television, and he advised the Pope on the technical details of the mission.
In the pursuit of his scientific research, O'Connell became a close friend and collaborator of an international community of astronomers. As director of the Riverview Observatory he went to Europe in 1948 to attend the first post-war meeting of the International Astronomical Union held at Zurich, and on that occasion visited many European observatories. His visit to Utrecht was noteworthy, for there he established a lifelong friendship with Professor Marcel Minnaert who later encouraged him to issue the now famous book on the Green Flash, which, published in collaboration with Brother Karl Trench SJ, provides excellent documentation on optical effects that occur in the Earth's atmosphere when the sun is rising or setting.
However, O'Connell was best known in the international community of astronomers for his research on double stars. He discovered an effect, since known as the “O'Connell Effect”,
concerning the rotation of the line of the apsides (the major aids of the double star's ellipticalorbit). The discovery of this effect was typical of the scientific work of O'Connell. lt required a long period of painstaking observations and careful analyses over many years.
In addition to his membership in the academies and institutes already mentioned, O’Connell was a member of the National Research Council of Australia, and an honorary member of the Royal Irish Academy He was also a member of the Royal Society of New South Wales, publishing three papers on earthquakes and the Galitzin seismograph. He served on council, 1946-49, and was vice-president, 1950-52. He became an honorary member of the Society in 1953.
O'Connell retired as director of the Vatican Observatory in 1970. He was president of the Pontifical Academy of Science, 1968-72. While he was an indefatigable worker and consequently very jealous of his time, he still treasured his friends immensely, and was always nurturing new friendships. Even during his last years, when he was largely bedridden, he developed new friendships among old and young alike. The students at Riverview remembered him for showing groups of boys the Moon, planets and the stars on clear nights and for his unfailing gracious word and cheery smile for staff and students.
Many were the nights that, under the then clear skies over Castel Gandolfo. O'Connell climbed the stairs to the telescope atop the papal palace passing die plaque inscribed “Deum Creatorurn Venite Adoremus. He was very intelligent, hardworking and always a gentleman genuine international Jesuit.

Note from Noel Burke-Gaffney entry
1950 He was appointed Director of the Observatory at Riverview after Daniel O’Connell was appointed to the Vatican Observatory

Note from William O’Leary Entry
He remained at Riverview until his death in 1939, directing the observatory until 1937 when Daniel O'Connell became director

Note from Edward Pigot Entry
His extremely high standards of scientific accuracy and integrity made it difficult for him to find an assistant he could work with, or who could work with him. George Downey, Robert McCarthy, and Wilfred Ryan, all failed to satisfy. However, when he met the young scholastic Daniel O'Connell he found a man after his own heart. When he found death approaching he was afraid, not of death, but because O’Connell was still only a theologian and not ready to take over the observatory. Happily, the Irish province was willing to release his other great friend, William O'Leary to fill the gap.

◆ Irish Province News
Irish Province News 23rd Year No 4 1948
Fr. Daniel O'Connell of the Vice-province visited Ireland after an absence of many years, early in September: He has had a very busy time since he left Australia : he did some astronomical work at Leyden before going to the Vatican Observatory where he spent 6 weeks ; he attended a Meeting at Zurich of the International Astronomical Union and then went on to Oslo for the Congress of the International Union of Geodesy and Geophysics. He has been invited to lecture to the Irish Astronomical Society at Armagh and to be the guest of Dr. Lindsay, Director of the Armagh Observatory, who is a good friend of his since the Harvard days when they spent two years together at that Observatory. Fr. O'Connell is due to sail for the United States from Southampton on 6th November and will spend some months at Harvard Observatory before returning to Australia.

Irish Province News 24th Year No 1 1949
On 6th November Fr. Daniel O'Connell, of the Vice-province, who during his stay in Ireland gave evidence in Fr. Sullivan's cause, left Southampton for U.S.A. on 6th November.
Irish Province News 58th Year No 1 1983
Obituary
Fr Daniel O'Connell (1896-1913-1982) (Australia)

I met Dan O'Connell for the first time when I went to the noviciate, then in Tullabeg. I found him a quiet novice but a very pleasant companion. We both went to Rathfarnham and were together in our First Arts year (1916-17). He was a brilliant and highly intelligent man. He took a keen interest in Fr William O’Leary's seismograph, which stood in Rathfarnham grounds, and frequently inspected it with him.
We parted company in 1920, when he went to Valkenburg for philosophy while I followed the subject in Milltown. Two years later we were both posted to Australia. We did not travel there together but met in Riverview College, Sydney, where we spent our regency. In Riverview was the Irish Jesuit, Fr Edward Pigot, who had an astronomical observatory, in which Dan became keenly interested, Fr Pigot himself had erected this observatory and fitted it out with a strong telescope for watching the various stars at night. He was also an accomplished pianist and taught Dan the piano.
In 1926 Dan followed me to Milltown for theology. Together we were ordained there by the Archbishop of Dublin, Dr Edward J. Byrne. Later, whenever Fr Dan came back to Dublin, he stayed with Dr Byrne's successor, Dr John Charles McQuaid, who was a great friend of his, as they had been classmates in Clongowes. Twenty or so years after Fr Dan's return to Riverview, he was called to Rome to take charge of the Vatican observatory, and ended his days in Rome.

The summary notice, taken from L'Osservatore Romano (16th October 1982) and transmitted by Frs Joseph Costelloe and John P. Leonard of the General Curia, fills in some of the external details of Fr O’Connell’s life:
"Yesterday evening, Thursday, 14th October, Fr Daniel O’Connell, former Director of the Vatican Observatory and ex-President Emeritus of the Pontifical Academy of Sciences, died after a long illness in the infirmary of the Jesuit General Curia in Rome.
Born in Rugby, Great Britain, in 1896, he had entered the Society of Jesus in Ireland in 1913. After completing his studies in physics and mathematics at the University College, Dublin, he spent two years of special studies at the Harvard College Observatory in Cam bridge, Massachusetts, between 1931 and 1933.
He then became Director of the Riverview College Observatory in Australia, where he remained until 1952, when he was appointed Director of the Vatican Observatory, which he directed until 1970. From 1968 until 1972, he was, by the appointment of Paul VI, President of the Pontifical Academy of Sciences.
Known for his scientific labours, especially for his researches on double stars - an area in which he discovered a particular effect named after him - Fr O'Connell was a member of many international societies, including The National Research Council of Australia, The Royal Academy of Ireland, and The Royal Society of New South Wales”

Frs George V Coyne and Martin F McCarthy SJ, of the Vatican Observatory brought out a glossy four-page printed leaflet (of A4-size page) as a memorial to their fellow-astronomer and fellow-Jesuit. Five of the photographs therein show Fr O’Connell greeting in turn four recent Popes, including the present one. An interesting account is also given of his astronomical work. The editor of IPN has at his disposal at least one photocopy of this leaflet, which he will gladly send to any contemporary of Fr Dan’s or to any other interested person who might like to have it.
Fr Dan O’Connell contributed two articles to the New Catholic Encyclopedia: “Calendar reform” and “Vatican Observatory”. He featured in past numbers of The Clongownian: 1953, pp. 9-12, “Astronomer and seismologist”; 1968, pp. 42-3; 1974, p. 33 (copy of an autographed letter to him from Paul VI).

◆ Interfuse
Interfuse No 86 : July 1996

Obituary
Fr Daniel O’Connell (1896-1982)
Like William Keane, Daniel O'Connell was a brilliant student who devoted his life to the Lord's work in the Society. He was born at Rugby, England, on 25th July to an Irish father and English mother, At the age of 12 when his parents died, he went to Ireland and completed his secondary education at Clongowes College; in view of his examination results, I presume that he was Dux of his class, as William Keane had been. One of his masters was Henry Johnston, and one of his fellow students was John Charles McQuaid, later a famous Archbishop of Dublin. At the age of 17, he entered the novitiate of the Irish Province at Tullabeg on August 8th, 1913. A fellow novice described him as 'quiet but a very pleasant companion', qualities noted in him throughout his later life which were to win him many friends.

It may be remarked, incidentally, that although he was related to the Liberator' he was called Daniel after another member of the family.
University Studies
University studies were at the National University of Ireland where he did a brilliant scientific course with first class honours in experimental physics and mathematics, ending with a Master of Science. With other scholastics he would have commuted to the University from Rathfarnham Castle, Juniorate residence and later retreat house. In its grounds was a seismograph, erected by Fr. William O'Leary, who was later to take over from Fr. Pigot as Director of the Riverview Observatory. Daniel took a keen interest in this, a fact which was not lost on Fr. O'Leary who was later to choose him as their designate'. For Philosophy, Daniel was sent to Valkenburg in Holland where the German Provinces had their house of studies, having been driven out of Germany by Bismarck's Kulturkampf. Here he pursued part-time studies in astronomy under important German Jesuit scientists. Arrangements had been made for him to enter Cambridge University to study relativity under Sir Arthur Eddington but he experienced a breakdown in health, had lung trouble, and was sent to Australia to recuperate and do Regency. He taught at the observatory in 1923 under Fr. Pigot. The latter was also a fine pianist and taught Daniel the piano.

In 1926 Daniel returned to Ireland for theology, studied at Milltown Park and was ordained on July 31st, 1928 by the then Archbishop of Dublin. Tertianship was at St. Beuno's, Wales(1930-1931).

Further Studies
Destined now to become a professional astronomer, Daniel returned to Australia and the Observatory but the following year went to Harvard for further studies and research at its Observatory, then a great centre of research under Howard Sharpley and others. His principal occupation there was the study of variable stars which he continued throughout life and through which he made his name as an astronomer. In 1948 he was awarded a doctorate in science from the National University of Ireland for outstanding services to astronomy, but he also became interested in seismology and the measurement of time with various types of clocks. (These and other scientific details are taken from a brief memorial bulletin published by the Vatican Observatory after Daniel's death in 1982.)

Riverview Observatory (1933-1952)
After visiting other observatories, he returned to Riverview as Assistant Director of the Observatory, taking over from Fr. O'Leary in 1938 when the latter died on the Riverview golf course. (Fr. O'Leary is remembered at Riverview as the inventor of a Free Pendulum clock of superb accuracy which used to stand in the corridor outside the Rector's room in the old building.)

The Observatory received a small grant (£450 in 1939) from the Australian government. When Daniel took over and for a number of years afterwards it had the only fully equipped seismological station in Australia and its reports appeared in the local papers whenever a major earthquake occurred. Its astronomical work consisted mainly in the photographing of variable stars, a work which Daniel carried out himself in the hours of darkness when others were asleep. The increasing illumination of the skies above Sydney rendered this more and more difficult but he managed to make 20,000 plates over the years.

During his years at the Observatory Daniel became a highly respected figure in astronomical circles in Australia and elsewhere, becoming, for instance, a Fellow of the Royal astronomical Society among other memberships. But he was no remote scholar. He had a gift for popularizing science when this was needed and he was called on occasionally by the ABC for broadcasts. When Fred Hoyle (of Steady State fame) delivered a number of lectures on the BBC on “The Nature of the Universe” Daniel was asked to give three lectures on the ABC on the same topic. He called his lectures “According to Hoyle” and made it very clear that his distinguished counterpart was wrong in dismissing the Creator from the origin of things. Hoyle, who must be a very old man now, is said to be now more in favour of creation, impressed by the 'fine tuning' of the universe.

Riverview
While Daniel did not teach, he was an object lesson to the boys that science and religion could be reconciled. He was also a familiar and friendly priest, whose sermons they listened to in the chapel with more than usual attention. He could get down to their level. There were occasional guided tours of the Observatory - I had some myself when I was at Riverview as a scholastic 1947-1949. He was also a 'good community man'. The only thing that annoyed him was noise, and most particularly the lowing of Brother O'Brien's cows which disturbed his sleep by day after a night of observation. But he did not have recourse to the 'ultimate deterrent' of shooting one or two. He bore it cheerfully enough as he did the loneliness of much of his work. I think of him as a very dedicated, kindly person.

Vatican Observatory
In 1952 news came that Daniel had been appointed Director of the Vatican Observatory located at the papal summer residence at Castelgandolfo in the hills 16 miles from Rome. His appointment was a 'most strict secret', which he observed most faithfully, but it was leaked out over in Rome so he was embarrassed by people asking him if it were true. Due to illness and the necessity of taking up the appointment quickly, he had little time to say goodbye to his many friends in Australia. He left by ship on July 26th, 1952, bringing to an end almost a quarter of a century at Riverview and its Observatory, both of which remained very dear to him.

From 1952 until his retirement in 1970 he was Director at the Vatican Observatory. He was President of the Pontifical Academy of Science from 1968 to 1972. He served three Popes and had close personal relations with them. Over the years he published a number of books (e.g. The Green Flash, Stellar Populations, Nuclear Galaxies) and many papers. The Vatican Observatory gave him much greater scope than he would have had at Riverview. He could do better work and was in contact with a wider group of scientists. There were times when he lamented that he had never given a retreat, but his was a full-time ministry.

Retirement (1970 - 1982)
His health, never very robust, gave him increasing problems so he had ultimately to retire from the Observatory and come to live in Rome at our Curia. The Pope wanted him to stay in Rome and keep in touch with the Pontifical Academy. In August 1973 he was allowed to make a trip to Australia to attend a conference and make contact. Of course, he had always kept in touch and delighted to meet Australian Jesuits studying in Rome. I have very happy memories of meeting with him during the 32nd General Congregation. He had a great memory for the Australian brethren and even for the boys he had known at Riverview.

His health became worse and worse so that for the last two years he was practically bed-ridden. He died in the infirmary at the Curia on October 13th, 1982. The notice in the Osservatore Romano mentioned that he had bore his long illness with marvellous serenity and was comforted by the special blessing of the Holy Father, John Paul II. One can only say that the papal blessing was richly deserved - Daniel O'Connell had been a very faithful servant of the Church in the difficult field of science.
With similar talents and in different ways, William Keane and Daniel O'Connell made very significant contributions to the work of the Province and the Society. As they were men who shared their wisdom with others we may trust that they will shine like stars for all eternity (Book of Daniel, 12:3)
John Begley
Australian Province Taken from “Jesuit Life” Newsletter

◆ The Clongownian, 1953
Astronomer and Seismologist
Father Daniel O’Connell SJ
THE appointment of Father Daniel O'Connell SJ, director of Riverview Observatory, New South Wales, Australia, since 1938, as Director of the Vatican Observatory in Rome, climaxes a long and eminent career as astronomer and seismologist.
Father O'Connell enjoys world repute as a scientist and he has contributed much to the high reputation enjoyed by the famous Jesuit observatory at Riverview.
He holds the Doctorate of Science of the National University of Ireland and the Docotrate of Philosophy of the Gregorian University of Rome, and is a Fellow of the Royal Astronomical Society.
He was born near Rugby, England, in 1896, of an Irish father, a civil servant and a native of County Limerick, and an English mother. He had two brothers and one sister, all of whom are still living. He went to Ireland as a boy of 12, following the death of his parents, completed his schooling at Clongowes Wood College, and entered the Society of Jesus at Tullabeg at the age of 17.
His family has a 600-years-old affinity with that of “The Liberator”. He was not, however, called after “The Liberator”. The Christian name, Daniel, was traditional in his family.

His first introduction to astronomy was a year's private study with the late Father W O'Leary SJ, a famous Irish Jesuit astronomer and seismologist, who at that stage was Director of the Rathfarnham Observatory from 1929 to 1938. He began by setting up some telescopes at Rathfarnham, largely as a hobby.

Father O'Connell completed his MSc degree at University College, Dublin, in 1920, after a brilliant course of study, specialising in Mathematics and Experimental Plıysics. He topped all his examinations, graduated with first-class honoura, and was awarded a travelling student ship in Mathematics. Whilst he was still an undergraduate he was in charge of the Rathfarnham station for several years after the departure of Father O'Leary.

He completed his philosophical studies at the Jesuit House at Valkenburg, in Holland, where he also pursued spare time astronomical studies under world famous Jesuit scientists like Father Michael Esch SJ, expert on variable stars; Father Franz Xavier Kugler SJ, world authority on Assyriology and Babylonian astronomy, and Father Theodor Wulfe SJ, world-ranking physicist.

Arrangements had been made for him to enter Cambridge University on a travelling scholarship where he would have studied relativity under Eddington, when he experienced a breakdown in health and was sent to Australia by his superiors to recuperate. Prior to this, he had never dreamt of going to Australia, had thought little about that country, and had few friends there.

An interesting and significant incident occurred whilst he was studying at Valkenburg. Seemingly for no apparent reason, Father Edward Pigot SJ, Founder of Riverview Observatory, appeared at the college one day during a visit to Europe. The young Jesuit student met the veteran and conversed with him. He was later invited to accompany him to the railway station to see him off. Just before he boarded his train, Father Pigot mentioned that his real reason for coming was to see the future Director of Riverview and to “look him over”. It was no surprise when he later sought him as his assistant.

Father O'Connell was appointed to St Ignatius College, Riverview as teacher of physics and assistant to the Director of the Observatory, Father Pigot. Father O'Connell is still happy to recall that another assignment in the early days was that of sports master at St Ignatius. In 1923 he was appointed assistant director of the observatory, and one of the first tasks he undertook in his new post was to advance the local study of solar radiation.

Father O'Connell returned to Dublin in 1926 to complete his theological studies and was ordained at Milltown Park by Archbishop Byrne in 1928. After two more years of theological studies he com pleted his tertianship in St Beuno's College, Wales.

During 1931 to 1933, Father O'Connell was a member of the staff of the Harvard University Observatory, renowned for its work on variable stars, where he completed post-graduate studies and research on variable stars and other aspects of astronomy. He published numerous papers in Harvard publications, and has since acknowledged that his work at Harvard was the foundation of his later contribution to astronomy.

During his stay in the United States Father O'Connell visited Mount Wilson and Lick Observatories in California before returning to Australia via Japan, China, Java and the Philippines, where he visited leading observatories and advanced his practical studies. The Lembang Observatory in Java was one that held special interest for him.

Father O'Connell resumed his work at Riverview Observatory at the end of 1933. In 1935 he initiated the “Riverview Observatory Publications”, which now enjoy an international reputation. Later he also founded the observatory's “Geophysical Papers” and “Reprint Series”, which are also known and used internationally. In 1948 Father O'Connell spent 10 months in Europe. He was the Australian delegate at the conference of the International Astronomical Union at Zurich and that of the International Union of Geodesy and Geophysics at Oslo. He spent six weeks at the Vatican Observatory and visited other leading observatories of Europe.

During World War II, Father O'Conneil, working at the Riverview Observatory collaborated with the United States Government in the location of earthquakes in the Pacific zone in relation to war strategy. This work was carried on in the post-war period and is still taking place. Each week a cabled report in code is sent to the United States from Riverview. He was also consulted by the Imperial War Graves Commission concerning possible earthquake damage to war cemetery sites in the Pacific area.

In 1948 Father O'Connell received his Doctorate of Science from the National University of Ireland in recognition of his outstanding contributions to science.

Father O'Connell is a member of leading Australian and overseas societies and other organisations, and has contributed numerous research papers and other writings to their publications and proceedings.

He is a member of the Royal Irish Academy and the international Astronomical Union, Fellow of the Royal Astromomical Society, Vice-President of the Royal Society of New South Wales, member of the National Research Council of Australia and the National Committee on Astronomy, Geophysics and Calendar reform; Chairman of the Board of Visitors of the Commonwealth Observatory, Mount Stromio; Australian representative on the Committee for Seismology of the Pacific Science Commission and member of many other scientific councils and committees in Australia. Father O'Connell resigned from 19.Boards and Committees..

Under Father O'Connell's direction, the Riverview Observatory has conducted a programme of continuous research that has been responsible for important discoveries. In the field of astronomy, eclipsing stars and cepheid variables have received special study. The photographic photometry of these stars has been one of the main aspects of the observatory's programme. Hundreds of new variable stars have been discovered, and much original research has been completed on known stars. About 15,000 plates are on file in the observatory.

Variable stars are those which are con stantly changing in brightness. Another star may move in front of them, they may expand or contract becoming hotter and brighter.

Knowledge of variable stars is highly important and basic to progress in modern astronomy. But for a knowledge of cepheid stars, for example, scientists would not have the faintest notion of the size of the universe,

One of Father O'Connell's latest activities was the use of photo-electric equipment in relation to variable stars.

Father O'Connell is reassured by the knowledge that this and other phases of the work at Riverview will continue and, naturally, it is his hope that necessary staff and equipment will be forthcoming. The fact that the direction will be in the hands of Father Burke-Gaffney gives Father O'Connell confidence in the future work and role of the observatory. Father O'Connell has taken some material on southern stars with him to Rome for completion.

In the field of seismology, the observatory's programme has included the regional study of earthquakes and the relation ship between earthquake waves and the interior of the earth.

The publications of Riverview Observatory are an important aspect of the work. They include four series - the “Seismological Bulletins”, which have appeared since 1909, the “Riverview Observatory Publications”, which began in 1935, the “Reprint” series, which date back to 1936, and the “Geophysical Papers”, which were founded in 1946. All of them are circulated and read all over the world.

The Riverview Observatory, which progressed under Father O'Connell, has never been anything but first-rate. It inherited this tradition from its founder and it was maintained by later directors. Complete accuracy has always been its aim, and all of its work has proved to be as careful and painstaking as human processes can ensure. Its equipment has always been the best available and its overhead has growii in dimension as well.

Father O'Connell left Sydney by slip for Rome on July 26 to take up his net post.

It distressed him that he was unable to make a personal farewell to many of his friends before he left Australia, due to the fact that he was confined to bed until the day before his ship sailed.
The Catholic Weekly (Sydney)

◆ The Clongownian, 1983
Obituary
Father Daniel Joseph Kelly O’Connell SJ
On October 14, 1982, the Jesuit order lost one of the best known of its modern scientists, the internationally acclaimed astronomer: Father Daniel J K O'Connell SJ. After several years of serious and confining sickness, Father O'Connell died peacefully among his Jesuit brothers at the order's headquarters in Rome, where he had settled after his retirement in 1970. In addition to directing the Vatican Observatory from 1952 to 1970, he was President of the Pontifical Academy of Sciences from 1968 to 1972 and President of the Commission on Double Stars of the International Astronomical Union from 1955 to 1961. He served three popes and had close personal relationships with all of them.

Born in Rugby, England, in 1896, he entered the Jesuit order in Ireland in 1913. He received his diploma in experimental physics and a Master of Science degree in mathematics at University College Dublin, and later a Doctorate in Science from the National University of Ireland. He studied from 1931 to 1933 at the Harvard College Observatory, Cambridge, Massachusetts, and was subsequently to have studied with the famous Sir Arthur Eddington. However, because of a lung condition, Jesuit superiors, in order to provide him with a more favourable climate, assigned him to the Riverview College Observatory, Sydney, Australia, where he became director in 1938.

During the years that Father O'Connell was at Harvard, the observatory was at the centre of the major developments in astronomical research and especially those which were to lead within the next few decades to the notion of the expanding universe of galaxies. He was thus associated with such eminent astronomers as Harlow Shapley, Cecilia Payne Gaposhkin, and others. His principal occupation at Harvard, a pursuit which he continued for the rest of his life, was the study of variable stars; but he also became known as a keen card player, especially at bridge. In fact, a story is told of how two young graduate students were duped into an evening of bridge against Father O'Connell and the famous cosmologist Abbé Georges Lemaitre on the occasion of a visit which the latter paid to the Harvard College Observatory. The students, not knowing the true identity of their challengers except that they gave a distinct impression of being neophytes at bridge, since they were overheard explaining to one another in broken English and French the names of the cards, were a bit embarrassed to accept the challenge for fear of crushing opponents to whom they were expected to show at least respectful deference. After a long evening of play the students, soundly defeated and thoroughly deflated, approached the famous Harlow Shapley for an explanation. His only remark to them was that the game must have been both an honest and an intelligent one, at least on the part of the two older gentlemen, since both of them were on the one hand Catholic priests and on the other eminent scientists.

While at the Riverview College Observatory, in addition to his study of variable stars, Father O'Connell, under the tutelage of the famous Father Wm O'Leary SJ, developed a keen interest in seismology and in the measurement of time with various types of clocks. This latter pursuit led him into a life long interest in the calendar and calendar reform, a study which served him well in later decades, since he was asked to advise popes on calendar reform and the cycle of ecclesiastical feasts.

Called to be director of the Vatican Observatory in 1952, Father O'Connell began a career of unique service to the Church which spanned the reign of three popes and saw immense developments in astronomical research from the initial concept of various stellar populations to an expanding universe containing active galactic nuclei and quasars, In fact, during his directorship, once near the beginning and once at the end, Father O'Connell organized Study Weeks of the Pontifical Academy of Sciences at which some of the world's most capable astronomers discussed the topics respectively of Stellar Populations (1957) and Nuclei of Galaxies (1970). As a result of these Study Weeks two books were published, both edited by Father O'Connell, which have become classics of astronomical literature.

Of his many contacts with the popes he served, his relationship with Pope Pius XII was an especially close one. He frequently advised the pope, himself a very keen and diligent student of the natural sciences, on topics of current scientific research. The International Astronomical Society held its triennial meeting in Rome in 1952, the same year that Father O'Connell came as director to the Vatican Observatory. At an audience and reception given by the Pope, the first opportunity was given to the pontiff to appreciate what a qualified representative the Church had in Father O'Connell as an interpreter of the Church's aspirations to the culture of science. It was under Pius XII that the major modern research tool of the Vatican Observatory, the Schmidt telescope, planned under his predecessors but completed under Father O'Connell, was inaugurated and blessed. Pope Pius XII often visited the observatory and, in fact, as a gesture of his interest, came to view through the Schmidt telescope with Father O'Connell on the night when the Space Age was born with the launching of the Russian Sputnik.

Pope John XXIII showed a special affection for Father O'Connell and the observatory staff and not infrequently paid visits to Father O'Connell's office, which was located directly above the Pope's private study. At the time of the landing of the first man on the moon, Father O'Connell had the privilege of viewing the event with Pope Paul VI over a specially installed television and he advised the Pope on the technical details of the mission.

In the pursuit of his scientific research, Father O'Connell was a close friend and collaborator of an international community of astronomers. As director of the Riverview College Observatory, he came to Europe in 1948 to attend the first postwar meeting of the International Astronomical Union held at Zurich, and on that occasion he visited many European observatories. His visit to Utrecht was noteworthy, for there he established a life long friendship with Professor Minnaert who later encouraged him to issue the now famous book on the Green Flash, which, published in collaboration with Brother Karl Treusch SJ, provides excellent documentation on optical effects which occur in the earth's atmosphere when the sun is rising or setting. However, Father O'Connell was best known in the inter national community of astronomers for his research on double stars. He discovered an effect - since known as the “O'Connell Effect”, concerning the rotation of the line of the apsides (the major axis of the double star's elliptical orbit). The discovery of this effect was typical of the scientific work of Father O'Connell. It required a long period of pains taking observations and careful analyses over many years.

In addition to his membership in the academies and institutes mentioned above, Father O'Connell was a member of the National Research Council of Australia, and an honorary member of both the Royal Society of New South Wales and of the Royal Irish Academy

While he was an indefatigable worker and consequently very jealous of his time, he still treasured immensely his friends and was, as a matter of fact, always nurturing new friend ships. Even during his last years, when he was largely bedridden, he developed new friend ships among old and young alike. There was never an international scientific conference attended by Vatican astronomers in the Rome area where the participants failed to request to pay a visit to Father O'Connell. Many were the nights that, under the then clear skies over Castle Gandolfo, Father O'Connell climbed the stairs to the telescope atop the papal palace passing the plaque inscribed thus: Deum Creatorem Venite Adoremus. In serving many, of high and low station alike, he was serving but One, the Creator of all that he observed. For that Daniel Joseph Kelly O'Connell, sj. has been called to his Father and we are happy for him.

George V Coyne SJ (Maryland) and Martin F McCarthy SJ (New England), Vatican Observatory.

Born: 19 March 1869, Ranelagh,Dublin
Entered: 30 October 1886, Loyola House, Dromore, County Down
Ordained: 27 July 1902, Milltown Park, Dublin
Final Vows: 15 August 1906, St Francis Xavier, Gardiner Street, Dublin
Died: 16 April 1939, St Ignatius College, Riverview, Sydney, Australia

Transcribed : HIB to ASL 05/04/1931

Early education at St Stanislaus College SJ, Tullabeg & Clongowes Wood College SJ

by 1891 at Leuven, Belgium (BELG) studying
by 1905 at St David’s, Mold, Wales (FRA) making Tertianship

◆ Royal Irish Academy : Dictionary of Irish Biography, Cambridge University Press online :
O'Leary, William J.
by David Murphy

O'Leary, William J. (1869–1939), Jesuit priest and scientist, was born 19 March 1869 in Dublin, son of Dr William H. O'Leary (qv), MP for Drogheda 1874–80, surgeon, and professor of anatomy at the Royal College of Surgeons in Ireland, and Rosina O'Leary (née Rogers). Educated at St Stanislaus College, Tullabeg, King's Co. (Offaly), and Clongowes Wood College, Co. Kildare, he entered the Society of Jesus in 1886, completing his noviciate at Dromore, Co. Down. He studied philosophy and astronomy at Louvain and theology in Dublin, and then taught science at Clongowes. In 1908 he travelled to Strasbourg and studied seismology under Prof. Meinka, and on his return to Ireland he set up a meteorological and seismological observatory at Mungret College, Co. Limerick, remaining as its director until 1915. At the request of a joint committee of the British Association and the Royal Meteorological Society, he carried out a series of upper-air investigations using sounding balloons (1911–14). This was the most westerly series of observations taken in Europe, and the results of O'Leary's research were published in the journals of both societies. By 1911 he had also completed a new seismograph, and this instrument was later praised by the astrophysicist and cosmologist, (Edward) Arthur Milne (1896–1950).

In 1915 he moved to the Jesuit community at Rathfarnham Castle, Dublin, and founded a seismological observatory there. He constructed his own seismograph, which had a moving mass of one-and-a-half tons. This instrument was still giving excellent service in the 1940s. He had also become aware of the need for extremely accurate timing in seismology and, turning his attention to chronometry, developed a free-pendulum clock which he patented in 1918.

In 1929 he went to Australia, where he became director of the observatory at Riverview College, New South Wales. In conjunction with the Lembang observatory in Java, he began a programme of photographic research on variable stars. He discovered several new variable stars, and the results of his research were published in the journals of the Riverview and Lembang observatories and also in the Astronomische Nachrichten. An accomplished and humorous speaker, he was extremely popular as a lecturer at scientific and public meetings. He supervised (1933–4) the construction of one of his free-pendulum clocks for Georgetown University. The clock was built by E. Esdaile & Sons in Sydney and shipped to Washington DC in August 1934, and O'Leary visited Georgetown in 1938. He was a leading member of several scientific societies, including the RIA (elected 1919), the Royal Society of New South Wales, the Société Astronomique de France, and the Seismological Society of America. He was also a member of the Australian National Committee on Astronomy and was elected (January 1938) a fellow of the Royal Astronomical Society.

He collapsed and died of a heart attack while playing golf (16 April 1939), and was buried at the Gore Hill cemetery, Sydney. There is a collection of his papers in the Irish Jesuit archives in Dublin, including seismological journals that he kept while at Rathfarnham. In February 1959 Georgetown University donated to the Smithsonian Institution its O'Leary free-pendulum clock and the collection of letters relating to its construction.

Fr William J. O'Leary, SJ, files in Irish Jesuit Archives, Dublin; The Catholic Press, 20 April 1939; Monthly Notice of the Royal Astronomical Society, vol. 100, no. 4, February 1940; Bulletin of the National Association of Watch and Clock Collectors, vol. 28, no. 240, February 1986, 44–51

◆ Jesuits in Ireland : https://www.jesuit.ie/news/jesuitica-earth-shakers-2/

JESUITICA: Earth-shakers
In the days when Rathfarnham Castle was still a residence for Jesuit university students, there was a seismograph (pictured here) housed in a small building off the drive. It was the creation of Fr William O’Leary, a Jesuit scientist with an avid interest in pendulums, who had already constructed a seismograph in Mungret in 1909. He had to keep air currents and spiders at bay, since their delicate vibrations could simulate the effect of major earthquakes on the sensitive instrument. He had dreadful luck in September 1923 when his seismograph was temporarily out of order during a catastrophic (over 100,000 dead) earthquake in Japan. But his pioneering work introduced generations of Jesuit students to the rigorous measurement and technical skill required in scientific research.

◆ David Strong SJ “The Australian Dictionary of Jesuit Biography 1848-2015”, 2nd Edition, Halstead Press, Ultimo NSW, Australia, 2017 - ISBN : 9781925043280
William O'Leary was educated at Tullabeg and Clongowes; his father was a surgeon and a Member of Parliament. While at Tullabeg he developed an interest in science. He entered the Society at Dromore, 30 October 1886, did his juniorate at Tullabeg, 1888-90, studied philosophy at Louvain, 1890-93, where he did much experimental work with the inverted pendulum. He later taught mathematics and physics at Clongowes, 1893-99, studied theology at Milltown Park, 1899-03, and finished his studies with tertianship at Mold, Wales, 1904-05. In 1900 he published a textbook on mechanics.
In an obituary notice in the “Monthly Notices of the Royal Astronomical Society, Vol. 100, No. 4,” 1940, it said that O'Leary's “mind ran on original lines. He was never content with stereotyped textbook solutions, he had to work out each problem for himself from first principles. In this way he was able to study many questions from a fresh angle and to develop original lines of research various branches of science. Combined with this was a highly developed inventive talent and the ability to design new instruments and the skill to construct them”.
After studies, O'Leary taught physics, chemistry and mathematics, and was assistant prefect of studies at Mungret, 1905-15, as well as director of the seismological and meteorological observatory At the request of a Joint Committee of the British Association and the Royal Meteorological Society he carried out a series of upper-air investigations by means of sounding balloons. These were the farthest west observations had been made in Europe at the time.
One problem in seismometry was to obtain an instrument with a fairly long period and consequent high sensitivity O'Leary provided a satisfactory solution by constructing a two
component horizontal seismometer with trifilar suspension. One of these instruments was completed in Mungret in 1911. Later, he lectured in mathematics to the juniors at Rathfarnham, 1915-18, and started seismological observatory His “O’Leary Seismograph” was at that time the first and only one in the world. He also worked with Professor John Milne at the Shide Observatory in the Isle of Wight, and from whom he acquired the Milne-Shaw seismograph for his own seismography station at Rathfarnham. With these two seismographs, O'Leary was able to supply earthquake information to the whole country. The need for accurate timing in seismology turned O'Leary's attention to chronometry He saw that the secret of precision timing was to be sought in a free pendulum. He was one of true pioneers in the development of the free-pendulum clock in 1918.
O’Leary was minister, procurator and teacher at Belvedere, 1918-19, and then lectured mathematics and physics to the philosophers at Milltown Park, 1919-29.
He was was appointed to the Riverview observatory in July 1929. Besides introducing various improvements in the seismological department, he initiated a programme of photographic research on variable stars in collaboration with the Boscha Observatory, Lembang. He also invented and built a blink comparator, which proved successful in searching for new variable stars. He discovered many new variable stars and published several papers on variables in “Publications” of the Riverview and Ban Len Observatories and in the “Astronomisrlne Nachrichten”. Other inventions included a recording anemometer and a petrol gas plant.
Scientists and the general public appreciated O’Leary's lectures on astronomy and seismology His light and humorous touch combined with his clarity of exposition to render topics intelligible and interesting. Together with his scientific work, he found time to do good work as a priest. Many found him a wise counselor, and a humble and lovable priest and colleague. He was a little man, happy, charming, and quite unassuming in spite of his deep knowledge and high reputation.
He remained at Riverview until his death in 1939, directing the observatory until 1937 when Daniel O'Connell became director. The end of his life occurred when he collapsed and died on the golf course just after driving off. The suddenness of his death was a shock to the community, but he had had a heart condition for some time. This did not prevent him from planning fresh research and for new instruments. The day before he died he discovered a number of new variable stars with his newly completed comparator, and that night worked at the telescope taking star photographs. O'Leary was a member of the Royal Irish Academy, the Royal Society of NSW, the Société Astronomique de France, the Seismological Society of America, Past President of the NSW Branch of the British Astronomical Association, and a fellow of the Australian National Committee on Astronomy.

Note from Daniel O’Connell Entry
At this time he came under the influence of William O'Leary, the Irish Jesuit astronomer and seismologist, who at that time was director of Rathfarnham Castle Observatory in Dublin. While at the Riverview Observatory, working under William O'Leary.........

Note from Edward Pigot Entry
His extremely high standards of scientific accuracy and integrity made it difficult for him to find an assistant he could work with, or who could work with him. George Downey, Robert McCarthy, and Wilfred Ryan, all failed to satisfy. However, when he met the young scholastic Daniel O'Connell he found a man after his own heart. When he found death approaching he was afraid, not of death, but because O’Connell was still only a theologian and not ready to take over the observatory. Happily, the Irish province was willing to release his other great friend, William O'Leary to fill the gap.

◆ Irish Province News
Irish Province News 1st Year No 2 1926

SCIENTIFIC WORK AND INVENTIONS - Fr William O'Leary :
1909 Seismological observatory established at Mungret
1910 New type of seismograph invented and constructed at Mungret; A meteorological station in connection with the Meteorological Office established at Mungret; A complete set of recording instruments was installed; New type of anemometer, recording average and wind direction, invented and erected.
1912 The systematic investigation, by sounding balloons of the upper atmosphere over Ireland was begun. This important work was entrusted to Mungret by a joint committee of the Royal Meteorological Society and the British Association, as representing the International Upper Air Investigation Society, with headquarters at Strasburg. Mungret was the only Irish station entrusted with this work; The Erin Petrol Gas Generator invented by Messrs Maguire & Gatchell took over the construction of those machines, and erected a large number of them throughout Ireland.
1916 The Rathfarnham Seismological Station was established. The instrument, of the Mungret type, but of an improved design, was constructed at Rathfarnham.
1918 Precision clock invented, embodying the principle of a free pendulum. A model of a “Vertical Component” Seismograph invented some 3 years previously, was exhibited at the British Association Meeting at Edinburgh.

Irish Province News 9th Year No 1 1934
An Australian contemporary gives the following welcome news :
The Rev William O'Leary, SJ., Director of Riverview Observatory has been elected President of the New South Wales branch of the British Astronomical Association. in succession to Mr. W. F. Gale. Father O'Leary is a famous scientist, with a special knowledge of earthquakes. He studied astronomy in Louvain, Belgium, and succeeded the late Father Pigot to the charge of Riverview Observatory in July, 1929. Formerly he was Professor of Mathematics and Physics at the Jesuit College, Milltown Park, Dublin.

Irish Province News 12th Year No 2 1937

Rathfarnham :
Seismological Station : A change was made in the method of recording un the O'Leary seismograph. The records are now made on smoked paper by a stylus which gives a very clear, delicate trace. This method replaces the former ink inscriptions and is calculated to give much greater sensitivity, The improvement was carried out at the suggestion of Father O'Leary, Director of Riverview College Observatory, who sent all the necessary detail of construction. On January 7th the first big earthquake of the year was recorded and the success of the new method was assured.

Irish Province News 14th Year No 3 1939
Obituary :
Father William O’Leary
Born, Dublin, 19th March , Educated Tullabeg, Clongowes
1886 Entered, Dromore, 30th October
1887 Dromore, Novice
1888-89 Tullabeg, Junior
1890-1892 Louvain, Philosophy
1893-1898 Clongowes, Doc
1899-1902 1899-1902 Milltown, Theology
1903 Clongowes, Doc
1904 Mold, Tertian
1905-07 Mungret, Doc. Adj. Praef. stud, Cons. dom.
1908-09 Mungret, Doc. Doc. Praes. Sod. B.V.M., Cons. dom.
1910-12 Mungret, Doc. Doc. Praes. Sod. B.V.M., Cons. dom.; Dir obser, seismol, et meteorology
1913-14 Munget, Doc an 17, Praes. Sod. SS Angel; Dir obser, seismol, et meteorology
1915 Rathfarnham, Lect. Math., Conf. N.N. ; Cons. dom. an 1
1916 Rathfarnham, Praef Spir, Lect. Math.; Cons. dom an 2.; seismol
1917 Rathfarnham, Praef Spir, Lect. Math.; Cons. dom an 3.; Dir obser
1918 Belvedere, Minister. Doc..' Cons. dom.
1919-23 Milltown, Lect. Math. et Phys. , Conf. dom.
1924 Milltown, Lect. Math. et Phys.; Conf. N.N.
1925-26 Milltown, Lect. Math. et Phys.; Praef ton; Theol et Phil
19277-28 Milltown, Lect. Math. et Phys.; Praef ton; Theol et Phil; Conf. dom.
1929 Australia, Riverview, Dir obser, seismol; Astron meteor
1930-37 Australia, Riverview, Dir obser, seismol; Astron meteor; Conf dom
1938-1939 Australia, Riverview, Adj Dir Spec; Dir sect seismol; Conf dom

Father O'Leary died in Australia, Sunday, April 16th, 1939
Father O'Leary was born in Dublin, 1869. His father William O'Leary, well known for his medical ability, and for time a Home Rule M.P. in the party of Isaac Butt. Father O'Leary was educated at Tullabeg and Clongowes. He was best known as a teacher of physics and astronomy in the Colleges and Scholasticates, and for his work on seismology. His scientific work tends to make us forget his other gifts as a preacher and Retreat-giver, in which he was remarkably successful. As student at Louvain he developed an interest in pendulums, which was the basis of his seismological activities. A full account of his work in that department has been given in the “Irish Jesuit Directory” for 1938. A visit to Prof. J, Milne's observatory at Shide, Isle of Wight, was the occasion of his applying his knowledge of pendulums to the construction of his first instrument at Mungret. During the following years he constructed and equipped a really good seismological and meteorological station there, which he left behind him as a monument to his energy and activity when he was transferred
to Rathfarnham. Here, with characteristic perseverance, he continued his work, and set about designing and constructing the instrument now in use at Rathfarnharn, in conjunction with a standard Milne-Shaw seismograph added to the Observatory in 1932. This instrument was not meant to replace the “O'Leary Seismograph”, but to give greater accuracy in the recording of earthquakes. The horizontal pendulum of the latter has a mass of 1 lb. , the O'Leary pendulum has a mass of 1.5 tons. This is the only instrument of its kind in existence, and gives an exceedingly large and clear record.
An essential element in the recording of earthquakes is a very accurate clock, which enables the exact time to be recorded on the chart. Father O'Leary designed such a clock, which includes features of great novelty. In connection with this instrument Father O'Leary paid a visit to the United States. The clock has been described by the director of a well-known observatory as “a piece of first-class and most original work”. It is of interest to put on record that Father O'Leary not only designed both clock and seismograph, but made almost every part of each, and erected them himself. In addition to these instruments he designed a system of supplying petrol-gas for laboratories far from a supply of coal gas. This apparatus had a considerable success, and for some years was on the market, until trade difficulties stopped the sale. In addition to the records of his observations, Father O'Leary wrote a text-book on mechanics.
When Father Pigot died in Australia, in 1929, then a portion of the Irish Province, Father O'Leary was chosen to succeed him as director of the Riverview College Observatory, which included astronomy, seismology and meteorology, where his knowledge and experience enabled him to do much valuable work.
His death came suddenly and unexpectedly, as he had been working in the observatory only the night before. The Australian and home newspapers contained most appreciative notices of his work. An indication of the esteem in which he was held may be gathered from the Press account of his funeral. Archbishop Gilroy presided at the Mass, at which were present Archbishop Duhig and Bishops Coleman, Dwyer and Henscke, together with some 200 priests and many representatives of Catholic schools. The laity included many distinguished scientists and representative men, such as the Attorney-General, etc. Father O'Leary was an F.R.A.S., and past-President of the British Astronomical Association.
Those who knew Father O'Leary will miss him not only as a worker, but still more for his great charm and his many gifts, which made him an excellent community man and endeared him to all by his cheerful companionship and great sense of humour. He was noted for his punctilious observance of all his spiritual duties, and died as he had lived, working for God. RIP
The following came from an Irish priest :
"During the last few weeks I have felt that I would like to write and offer to you and your distinguished Order my sympathy on the death of Father O'Leary. Many, I am sure, have written many others, too, better equipped than I, shall write about him but as a humble priest, I would like to add my humble tribute to the memory of a saintly priest and a learned Jesuit.
When I took up the paper a few weeks ago and read the cabled account of his death, I could read no further. I was truly grieved, for I felt I had lost a great friend, a friend who was, I thought, in perfect health, when I met him only a few months ago. Our friendship began ten years ago on the emigrant ship that was relentlessly taking both of us to Australia. He, fairly advanced in years, I, a young priest just ordained. He, the eminent scientist and inventor, on his way to take up one of the highest and most important positions in Australia, I an obscure priest, to take up duty as a curate in some parish in the Diocese of Sydney. None of us young priests realised that we were travelling with such a distinguished man. There was nothing that led us even to suspect it. He moved among us, spoke freely to us offered us his sympathy for he knew our hearts were full. His heart, too, was full, for he felt then that he would never see again his beloved Ireland. I often thought it was a pity that he should have to leave Ireland at his time of life, for he loved Ireland with a love that was passionate, yet tender. Whenever I visited him at Riverview, that College so beautifully situated on an eminence overlooking Sydney's wondrous harbour, his thoughts ever wandered back to Ireland. Like every exile. as he wrote himself, he hankered for the green hills of holy Ireland. Others shall appraise his work as a scientist and astronomer - to me he was always the humble, sympathetic, priestly friend. With his passing I have lost a great friend, and Australia has most certainly lost an able and scholarly Jesuit, and saintly priest.
I am sure that his soul passed through Ireland on its way to Eternity. May he rest in peace".

◆ James B Stephenson SJ Menologies 1973

Father William O’Leary SJ 1869-1939
The name of Fr William O’Leary will go down in the Province as the founder of the seismograph at Rathfarnham Castle. He was also the inventor an ingenious clock and numerous other scientific devices, as well as author of a textbook on mechanics. But these achievements as a scientific inventor were hardly half the man.

He had a remarkable oratorical ability, and many a priest of the Province will recall his elocution classes … “O Mary, call the cattle home, call the cattle home across the sands of Dee”. He was a preacher and retreat giver of no mean order,

In 1939 he was appointed to the Directorship of the Observatory at Riverview, Australia. His end came suddenly on April 16th 1939, but found him not unprepared, for he was a religious of punctilious observance and scrupulous even to a fault in the matter of poverty.

◆ Interfuse

Interfuse No 109 : Summer/Autumn 2001

LEST HE BE FORGOTTEN : FR WILLIAM O’LEARY

Kevin A Laheen

There is a rumour doing the rounds in Rathfarnham at present that the building that once housed the seismograph will shortly be used as a snack-bar and tea room. Just in case there may be some truth in this rumour it would seem opportune to recall the name of Fr William O'Leary, SJ whose pioneer work in recording earthquakes won international acclaim for the seismograph station at Rathfarnham Castle.

Willie O'Leary was born in Dublin on 19 March 1869. The O'Leary family lived in Ranelagh. His father was a distinguished doctor, a Member of Parliament, and a personal friend of Isaac Butt. Willie spent the early years of his schooling in Tullabeg and then moved off to Clongowes when the two colleges were amalgamated in 1886. After his novitiate in Dromore he moved, back to Tullabeg to begin his Juniorate studies. In Tullabeg he manifested a great interest in and aptitude for science. It was during his philosophy years at Louvain that he did some experimental work on the inverted pendulum. This was the beginning of a lifelong work in the study of seismology which won for him an eminence in that science and in meteorology, and also, to a lesser degree, in astronomy.

During his years in Mungret College, 1905-15, his theories about earthquakes began to take practical shape. He built a house of solid stone some distance from the main building and in it he continued his study and experiments. His work during those years is well documented in the MUNGRET ANNUAL. However, it was in Rathfarnham Castle during the years 1915 17 that he built his own seismograph and the clock that recorded the time at which an earthquake took place. The famous “O'Leary Seismograph” was the only one of its kind in the world at that time and widespread interest in it was evident in international science circles.

He was on personal friendly terms with Professor John Milne, whose observatory in Shide, the Isle of Wight, he had visited on more than one occasion. Through this contact he acquired the Milne-Shaw seismograph for the station in Rathfarnham Castle. This instrument was not a substitute for Fr O'Leary's one, but both worked in tandem, recording the same earthquake though by different methods. The O'Leary seismograph recorded the quakes on a sheet of smoked paper on a large revolving drum, while the Milne-Shaw instrument recorded them by photography. It was interesting to watch the white lines being traced on the smoked paper as the drum revolved slowly while every minute the two glass pen nibs gave a tiny kick to the right in order to record the time.

Fr O'Leary's work received widespread notice in scientific publications. He was a Feilow of the Royal College of Science, and also a President of the British Astronomical Association. His reputation was so outstanding that when Fr Edward Pigot, SJ died in Australia in 1929, Fr O'Leary was requested to take his place as Director of the Observatory at Riverview College - “one of the highest and most important positions in Australia”. It was there during his early sixties that his work was highly appreciated and where at the same time he had an opportunity to further his own knowledge of astronomy.

Research and experimental work such as was done by Father O'Leary, is a very lonely occupation, and few people outside the researcher's field will manifest much interest. Fr O'Leary was fortunate in the fact that Fr Thomas V Nolan, SJ who was his Rector in Mungret College, appreciated his work and gave him every encouragement and support. Later Fr Nolan was appointed Provincial and in that office continued his sponsorship of Fr O'Leary's work. Providence was again on Fr Willie's side when they were both assigned to Rathfarnham Castle, Fr Nolan being the Rector and again continued to support him, especially in the erection of the seismograph station. He also encouraged Fr Willie to maintain his friendship with Professor Milne and to visit him at his observatory at Shide. Without this support one might be justified in asking if Fr O'Leary's experiments would ever have bome the fruit they eventually did.

In addition to his eminent place in the international community of scientists he was also a gifted preacher. He was much in demand as a retreat director, and was especially skilled in directing retreats to the clergy. His contemporaries found him a most affable companion who gladly shared his knowledge with anyone who manifested even the slightest interest in it. He died in Australia in 1939 in his seventieth year. Present at his funeral two archbishops, three bishops, over two hundred priests, and representatives from various branches of science. A priest who first met him on the ship en route for Australia, on hearing of his death, wrote, “In his passing I have lost a great friend, and Australia has certainly lost an able and scholarly Jesuit and a saintly priest”.

Should the building, which housed his seismograph station in Rathfarnham, ever become a snack-bar, it would certainly be appropriate to have a plaque or other memorial put up there. This would record the significant contribution to science that was made in that building, and would prevent the name and work of this great Jesuit from being forgotten.

I feel it is appropriate to conclude with a personal memory. One morning, midway through the Second World War, Dick MacCarthy and I were working in the seismograph station. Suddenly I noticed that the glass pens on the great revolving drum began to register a quivering motion. I called Dick and, in a matter of seconds, the pens went off in a swaying motion from left to right. We both realised that we were witnessing the great O'Leary seismograph recording an earthquake. Before the pens settled down, Dick had calculated that the epicentre of the earthquake was in the Pacific Ocean. In those days the house telephone was definitely off limits for all of us except Dick, who was allowed to use it for business connected with the station. He telephoned the Dublin newspapers with the news. An hour or so later we both cycled to the university for the morning lectures. Standing at the gates of the building was a newsboy crying out the greatest piece of misinformation ever heard, “Stop press! Stop press! Earthquake at Rathfarnham Castle!” We both had a laugh, and Dick said, “I bet the Rector will blame the pair of us for that”.

During the days of the war when news of any sort was censored and generous blackouts were imposed on any type of information, we were a real sensation among our fellow students for bearing the first bit of uncensored news to reach Dublin that day. Dick, who remained a close friend of mine all his life, died in Hong Kong a couple of years ago.

◆ The Clongownian, 1939

Obituary

Father William J O’Leary SJ

Father O’Leary was born in Dublin on March 19th, 1869. His father was Dr W O'Leary, a well-known doctor and a Home Rule MP in Isaac Butt's party. Father O'Leary was educated at Tullabeg (1880), but came to Clongowes at the amalgamation for a few months in the summer of 1886 to prepare for the “Autumn Matric”. He was a master at Clongowes 1893-'98, and again in 1903; after his ordination. Practically his whole life was occupied in the teaching of science and mathematics at Clongowes and Mungret, and in the Scholasticates of Rathfarnham and Milltown Park. During his philosophical studies at Louvain he became interested in pendulums, and did some very interesting experiments with compound pendulums, obtaining some beautiful curve records. This interest seems to have been the occasion of his interest in seismology later on. A visit to the observatory of Prof J Milne FRS., at Shide IOW., was the beginning of his work in that departinent. At Mungret he created a seismological and meteorological station which he fitted up with instruments of his own design. During this time he also made observations on high-altitude conditions by means of balloons. He was transferred to Rathfarnham in 1915, where he still further improved his apparatus, Here he designed and constructed one of the instruments still in use in the present station. This instrument is the only one of its kind in existence and gives a very open record. It is of the inverted pendulum type, and the “bob” weighs 1.5 tons! It was designed, constructed all except the “bob” and erected by Father O'Leary himself, who, in addition to his other gifts, was a skilled mechanic. Later on he was professor of Mathematics, Physics and Astronomy to the Jesuit philosophers at Milltown Park.

On the death of Father Pigot SJ, Director of the seismological and astronomical observatory of Riverview College, Sydney, he was appointed as his successor, and went to Australia in 1929. His previous studies and practical experience had fitted him for this position, and enabled him to do splendid work in his new post. Here, in addition to seismology, his work included such branches of astronomy as observations on solar radiation, and on variable stars. It is to be hoped that a full account of his work in Australia will be given us. As an inventor he also designed a method of supplying laboratories not in possession of coal gas, with petrol gas, both for illumination and heating. He published a text-book on mechanics, but, with the exception of the records of his observation, does not seem to have written anything else. Reference must be especially made to an accurate clock which he designed and constructed on principles first applied by him, which was for use in connection with his seismograph. Such a clock is an essential element in the recording of earthquakes, for it is necessary that a mark be made on the chart very accurately every minute. His clock combined the properties of extreme accuracy with the means of recording the minutes on the chart. Referring to this clock, Father D O'Connell SJ, the present director of the Riverview observatory, says that it is a most excellent and original piece of work. Except in the patent specification, the details have never been published. It is to be hoped that this will be included in an account of his scientific work.

But it would be a mistake to allow the record of his work as a scientist to render us oblivious of his other and far inore important qualities. All who knew Father O'Leary as a friend and companion need no reminder of his wonderful charm and gifts of character which made him popular with all. A great love of his country, and a strong sense of humour were characteristic of him. He has a fine voice, and as a preacher he was no less in demand than as a lecturer and giver of retreats. His friends have lost one who will not easily be replaced.

Himself the most unassuming of men, he was honoured by his scientific brethren, no less than he was loved by his brethren in religion. He was a member of the British Association, and more than once was special preacher at their meetings; he was also a Fellow of the Royal Astronomical Society, and Past President of the NSW branch of the British Astronomical Association.

His death came suddenly. He had been suffering from his heart, but this did not interfere with his work, and he had been working in the observatory only the night before. An indication of the esteem in which he was held in Australia may be gathered from the press account of his funeral. Archbishop Gilroy presided at the Requiem Mass, at which assisted Archbishop Duhig, and Bishops Coleman, Dwyer and Henscke. In addition, there were 200 of the clergy, as well as representatives of the Catholic educational establishments. A large number of distinguished laymen were also present, including the Attorney-General, members of the University and the president of Astronomical Society and Government Astronomer. RIP

H V Gill SJ

-oOo-

The following appreciation is from the pen of one who for many years taught in the same college as Father Willy :

For many years after his ordination, Father O'Leary taught in Mungret, and for a considerable portion of that period acted as Prefect of Studies. A splendid master, be had the gift of imparting knowledge clearly and of getting the boys thoroughly interested in their work. His subjects were Science, Mathematics and Latin. His lessons in Geometry were particularly fascinating - his own consummate skill in the use of instruments and the beautifully accurate figures which graced his blackboard made his pupils quite enthusiastic in their efforts to imitate and emulate him. He made the dry bones of that subject live -no easy task where boys are concerned.

He was highly popular with all the boys, though he never showed any undue leniency. He was strict, but not severe, just and impartial. All these features were prominent in another sphere of school life; Father O'Leary possessed histrionic talent in a high degree. His production, in conjunction with the late Father Willie Doyle, of the “Mikado” inaugurated the revival of theatricals in Clongowes. In Mungret he staged the “Private Secretary”, a very successful performance, one of many similar triumphs.

In the spiritual sphere he did untold good. He was director of the sodalities, a superb preacher, being a first class orator. Only those who lived with him could appreciate to the full the power of his example. He was popular, as we have said, but he used this as a powerful influence for good.

Boys are proverbially prone to hero worship, and this small, though tremendously strong, straightforward, cheerful and great hearted priest won their affection and admiration. They appreciated his great qualities in life, and we trust they will not forget him in death. Requiescat.

John Casey SJ

-oOo-

Father H V Gill has mentioned above that Father O'Leary had a great love for his country; here is an extract from a letter of Father Willy's to a friend in Ireland, written for the New Year :--

“Dear Ireland, how I wish I could see you again. I am too old to fall in love with strange lands and I love you alone. May God bless every tree and every blade of grass in you, may God bless every mother's son in you, and may God keep the Old Faith in you”.

◆ Mungret Annual, 1937

Obituary

Father William O’Leary SJ

The death of Father O'Leary in Australia will be deeply regretted by many of his past pupils. An old Mungret boy of Father O'Leary's time there writes to the Editor :

“I was at Mungret for five years, and during all that time Father O'Leary was a master there. He taught us Latin, Religious Knowledge, Mathematics and Science. But he taught us many others things besides these. I don't think there was any master of my time there the boys thought more of, or who had more influence with them. For all his lack of inches - he only looked about 5ft. 4ins, in spite of the black hair brushed straight up from his forehead - he was a most virile personality. I will always carry with me as one of the clearest memories of Mungret the picture of Father O'Leary pacing up and down the stone corridor as we went on our way to Mass, wearing his biretta and with his head sunk on his chest for all the world like Napoleon”.

For a man of his intellectual attainments allied as they were in him with a natural agility of mind and speed of accomplishment - it must have been a heart-breaking task to expound the elements of euclid to a junior grade class not specially gifted above their fellows. Only once in my time did I ever see it overcome him, and that was an occasion that none who saw will ever forget. One day in dealing with a boy whom the Lord never meant to learn euclid, he allowed himself to be betrayed into one or two natural expressions of impatience - just so much and no more. It made no impression on us nor on the boy concerned - we were I fear a thick-skinned lot - but next day when the class began, Father O'Leary called out the boy and apologised to him coram publico in terms which penetrated to our subconscious preceptions far deeper than any sermon. Talking of sermons reminds me that he was the boys' favourite preacher and confessor. He had a deep musical voice and a gift of oratory and also an ability to teach elocution which were all his own. I don't know if elocution is still taught in the schools or if it has been crowded out by the modern programme : to judge by the sort of thing one hears in “talks” from Radio Éireann even from possessors of University Degrees - the art of speaking and reading aloud is a lost one. Anyone who ever was in Father O'Leary's class or in one of his plays learned how to open his mouth and sound his consonants. He used to teach us Byron's poem about the Assyrian coming down like a wolf on the fold - I have every word of it yet - and when you came to the line ‘With the dew on his brow and the rust on his mail’ - woe betide you if you put a ‘Jew sitting on the poor man's brow’.

Science was, of course, his first love, but even that gave way before his love for Ireland. To hear him speak of Irish history or to listen to him sing ‘The West's Awake’, as we so often did was to know that the fire that burned in the breast of his distinguished father burned just as fiercely in his own. He must have known when he left Ireland in 1929 that the chances of his ever seeing home again were very small how hard that thought must have been those of us who knew him can well realise. He went like so many other Irishmen - and Mungret men have gone - where duty called him, and if he rests at last far from his own land that he loved so well, there lie around him the bones of many of his kith and kin to foregather at the resurrection. All the boys of his time in Mungret will join with me in a prayer for one than whom no one stood higher in our affections as a priest, a master, or a friend”.

D Gleeson