Smith is the fourth child of John Smith (1792–1828), a barrister, who dies when Henry is two. His mother, Mary Murphy (d.1857) from Bantry Bay, very soon afterward moves the family to England. He has thirteen siblings, including Eleanor Smith, who becomes a prominent educational activist. He lives in several places in England as a boy. His mother does not send him to school but educates him herself until age 11, at which point she hires private tutors. In 1841, at the age of 15, he is admitted to Rugby School in Warwickshire, where Thomas Arnold is the school’s headmaster. This comes about because his tutor, Henry Highton, takes up a housemaster position there.
At the age of 19 Smith wins an entrance scholarship to Balliol College, Oxford. He graduates in 1849 with high honours in both mathematics and classics. He is fluent in French having spent holidays in France, and he takes classes in mathematics at the College of Sorbonne in Paris during the 1846–47 academic year. He is unmarried and lives with his mother until her death in 1857. He then brings his sister, Eleanor, to live with him as housekeeper at St. Giles.
Smith remains at Balliol College as a mathematics tutor following his graduation in 1849 and is soon promoted to Fellow status.
In 1874, Smith becomes Keeper of the University Museum and moves, along with his sister, to the Keeper’s House on South Parks Road in Oxford.
On account of his ability as a man of affairs, Smith is in demand for academic administrative and committee work: he is Keeper of the Oxford University Museum of Natural History, a Mathematical Examiner for the University of London, a member of a Royal Commission to review scientific education practice, a member of the commission to reform University of Oxford governance, chairman of the committee of scientists overseeing the Meteorological Office and twice president of the London Mathematical Society.
In 2004, Bacik’s book Kicking and Screaming: Dragging Ireland into the 21st Century, is published by The O’Brien Press.
In 2007, she contested the Seanad Éireann elections for the third time in the Dublin University constituency, and is elected to the third seat, behind sitting Independent senators Shane Ross and David Norris. She initially sits as an Independent senator.
In February 2009, Bacik is included in an ‘All Star Women’s Cabinet’ in the Irish Independent. In March 2009, she confirmed claims made on a TV programme that she had taken two voluntary pay cuts of 10% in addition to a pension levy. In June 2009, she is the Labour Party candidate for the Dublin Central by-election. She comes in third with 17% of the first preference votes. She joins the Labour Party group in the Seanad in September 2009, and becomes Labour Party Seanad spokesperson for both Justice and Arts, Sports and Tourism. In November 2009, a feature by Mary Kenny of the Irish Independent includes Bacik in a list of women who “well deserved their iconic status.”
In May 2010, Bacik seeks Labour’s nomination to contest the next election in the Dublin South-East constituency but is not selected. In December 2010, she is added to the ticket as the second candidate beside Labour Party leader, Eamon Gilmore, in the Dún Laoghaire constituency for the 2011 Irish general election. Gilmore tops the poll, with Bacik receiving 10.1% of first preference votes but she is not elected. She is re-elected to Seanad Éireann at the subsequent election, after which she becomes Deputy Leader of the Seanad. She holds her seat in the Seanad in 2016 and in 2020.
On April 27, 2021, after the resignation of Eoghan Murphy from his Dáil seat in Dublin Bay South, Bacik announces her intention to stand in the upcoming by-election. She campaigns with an emphasis on providing affordable housing, as well as improving healthcare and childcare, tackling climate change, and achieving “a true republic in which church and state are separated.” During the campaign, she describes herself as having “more bills passed into law than any other Senator, on issues such as workers’ conditions, women’s health rights, and LGBT equality”. She also campaigns on increasing the number of sports amenities for children in the area, calling for unused Defence Forces football fields at the Cathal Brugha Barracks to be freed up for local sports, with the suggestion rejected by Fine GaelMinister for DefenceSimon Coveney. Fine Gael complains to RTÉ after she features prominently on National Treasures, a prime-time TV show broadcast by RTÉ during the campaign. RTÉ has strict rules about fair coverage of candidates during campaigns. The national broadcaster blames an “inadvertent error” for the programme being shown three days before the election. A steering group within the broadcaster tells Fine Gael that “the broadcast should not have happened.” Consequentially, RTÉ has to show a special report on the by-election on Prime Time to “ensure fair coverage is given to all candidates.”
Bacik wins this election, receiving 8,131 (30.2%) first-preference votes. It is her fourth attempt as a Labour candidate, and she expresses her delight at the success at the count centre in the RDS. Following the election, she is described by The Irish Times as “a formidable activist and public intellectual” and that Fine Gael’s perceived antipathy towards their former TD, Kate O’Connell, may have contributed to the surge in support to Bacik from women voters. The newspaper claims that her election is “a long overdue morale boost” for Labour.
In March 2022, Bacik confirms she will run to succeed Alan Kelly as Labour Party leader. Kelly states that he believes that Bacik will succeed him. On March 24, 2022, she is confirmed as Labour Party leader unopposed at a party conference in Dublin. In a speech, she says she will focus on the rising cost of living and the serious and global problems facing the country. She pledges that Labour will fight the next election as a “standalone party” rather than joining any left-wing alliance.
Mitchell’s family moves to Belfast while he is a child. He receives his formal education at Belfast Academy where he excels in mathematics. He begins to notice that his eyesight is failing. By the age of 16 he can no longer read and by the age of 22 he is completely blind.
Undeterred, Mitchell borrows £100 and starts up a successful business making bricks in the Ballymacarrett area of Belfast. This enables him to start building his own houses and he completes approximately twenty in the city. It is during this period that his talent for inventing comes to the fore and he fabricates several machines for use in brickmaking and the building trade.
Mitchell patents the screw pile in 1833, for which he later gains some fame. The screw-pile is used for the erection of lighthouses and other structures on mudbanks and shifting sands, including bridges and piers. His designs and methods are employed all over the world from the Portland, Mainebreakwater to bridges in Bombay. Initially it is used for the construction of lighthouses on Maplin Sands in the Thames Estuary in 1838, at Fleetwood Lancashire (UK) Morecambe Bay in 1839 and at Belfast Lough where his lighthouse is finished in July 1844.
In May 1851 Mitchell moves to Cobh to lay the foundation for the Spit Bank Lighthouse. The success of these undertakings leads to the use of his invention on the breakwater at Portland, the viaduct and bridges on the Bombay, Baroda and Central India Railway and a broad system of Indian telegraphs.
Mitchell dies at Glen Devis near Belfast on June 25, 1868, and is buried in the old Clifton graveyard in Belfast. His wife and daughter predecease him.
Parsons also performs some preliminary work in association with the practices of the electrodeposition of copper sulfate upon silver films circa 1865 while in search of the design for a truly flat mirror to use in a telescope. However, he finds it impossible to properly electroplate copper upon these silver films, as the copper contracts and detaches from the underlying glass substrate. His note has been cited as one of the earliest confirmations in literature that thin films on glass substrates experience residual stresses. He revives discussion in his work Nature’s August 1908 edition after witnessing similar techniques used to present newly devised searchlights before the Royal Society.
Although overshadowed by his father (when astronomers speak of “Lord Rosse”, it is almost always the father that they refer to), Parsons nonetheless pursues some astronomical observations of his own, particularly of the Moon. Most notably, he discovers NGC 2, a spiral galaxy in the constellationPegasus.
After some years of ill-health, Parsons dies on August 30, 1908, at Birr Castle and is buried in the local churchyard. He leaves a bequest to the Royal Society to establish the “Rosse Fund,” and a further £1,000 to the science school fund at TCD.
Mary Parsons (née Field), Countess of Rosse, Anglo-Irish amateur astronomer, architect, furniture designer, and pioneering photographer, is born on April 14, 1813, at Heaton Hall, Heaton, Bradford, West Yorkshire, England. Often known simply as Mary Rosse, she is one of the early practitioners of making photographs from waxed-paper negatives.
Field is the daughter of John Wilmer Field, a wealthy estate owner. She has a sister, Delia, and they are educated at home by Susan Lawson, a governess who encourages her creativity and broad interests, including astronomy. The sisters are joint heirs to their father’s fortune.
Through her family Field meets William Parsons, then Lord Oxmantown and the future 3rd Earl of Rosse, an Anglo-Irish astronomer and naturalist, and they are married on April 14, 1836, her 23rd birthday. In February 1841, Lord Oxmantown succeeds his father in the family peerage to become the 3rd Earl of Rosse. She, Baroness Oxmantown since her marriage, thus now becomes the Countess of Rosse.
In the early 1840s the couple becomes interested in astronomy, and the Countess of Rosse helps her husband build a number of giant telescopes, including the so-called Leviathan of Parsonstown, that is considered a technical marvel in its time. The author, Henrietta Heald, contends that she is not only a financial support to the building of the telescope, but is also involved in a practical and intellectual capacity. The Leviathan of Parsontown is completed in 1845 and holds the record as the world’s largest telescope for over 70 years. It is mentioned in Jules Verne’s science fiction novel, From the Earth to the Moon.
The Countess of Rosse is an accomplished blacksmith, which is very unusual for higher class women of the time, and she may have constructed some of the iron work that supports the telescope. Other metal cast items around the castle grounds are designed by her, including bronze gates.
During the Great Famine of 1845–47 in Ireland, the Countess of Rosse is responsible for keeping over five hundred men employed in work in and around Birr Castle, where she and her husband live.
The Countess of Rosse creates a huge dining room at Birr Castle in which to entertain scientific guests, which becomes increasingly used when Lord Rosse becomes President of the Royal Society of London in 1848. Guests include mathematicianWilliam Rowan Hamilton, who writes her a sonnet about his experience of gazing through the Leviathan.
In 1842, Lord Rosse begins experimenting in daguerreotype photography, possibly learning some of the art from his acquaintance William Henry Fox Talbot. In 1854, he writes to Fox Talbot saying that the Countess too has just commenced photography and sends some examples of her work. Fox Talbot replies that some of her photographs of the telescope “are all that can be desired.”
The Countess of Rosse becomes a member of the Dublin Photographic Society, and in 1859 she receives a silver medal for “best paper negative” from the Photographic Society of Ireland. Many examples of her photography are in the Birr Castle Archives. Much of the topography of Birr Castle that she portrayed has changed very little, and it is possible to compare many of her photographs with the actual places. She records the Leviathan in her photographs including one image showing her three sons, Clere, Randal and Charles along with her sister-in-law, Jane Knox, standing upright at the mouth of the telescope.
The Countess of Rosse gives birth to eleven children, but only four survive to adulthood:
Parsons is born in London on June 13, 1854, the youngest among eleven children of the famous astronomerWilliam Parsons, 3rd Earl of Rosse, of Parsonstown (now Birr), King’s County (now County Offaly) and Mary Parsons (née Field), a Yorkshire heiress. Only four sons survive to adulthood. He is strongly influenced by his father, who encourages him to use the workshops at the Birr Castleobservatory, and he is tutored at home by some of the assistant astronomers before entering Trinity College Dublin in 1871. He transfers to St. John’s College, Cambridge, and upon graduation in 1877 as eleventh wrangler in a class of thirty-six studying mathematics, he takes the unusual step for the son of an earl, of becoming a premium apprentice at the Elswick Engine and Ordnance Works of Sir William George Armstrong at Newcastle upon Tyne. In the period following this he develops a unique high-speed steam engine, and a torpedo which is powered by a gas turbine. He joins Clarke Chapman at Gateshead as a partner in 1884. In a matter of months he files patents for the world’s first effective steam turbine. These embody many novelties, but the key feature is an electricity generator rated at 6 kW and designed to run, directly coupled, at the astonishing speed of 18,000 rpm.
Parsons is not satisfied that his partners’ efforts to promote turbine development are sufficiently aggressive, and in 1889 he leaves to establish his own company, C. A. Parsons & Company, at Heaton near Newcastle upon Tyne. The price of this impetuous action is the loss of access to his original patents. He quickly establishes alternative designs and by 1892 he has built a turbo-alternator with an output of 100 kW for the Cambridge Electricity Company. Exhausting to a condenser, it has a steam consumption comparable with the best steam engines. Even his 1884 patents envisage applying turbines to marine propulsion, but it is 1893 before he can embark on the design of a suitable demonstration boat of 40 tons. By using careful tests on models, he perfects the hull shape and predicts the power requirements. At this time he recovers his 1884 patents and even wins the very rare prize of an extension for five years, which is a measure of the perceived national importance of his invention.
A syndicate is formed to raise the capital necessary to build Parsons’s turbine-powered vessel Turbinia. At the SpitheadFleet Review in 1897 she speeds among the ships of the world’s navies at 34.5 knots. In 1905 the Royal Navy decides to adopt turbines for its future warships. This example is followed by navies worldwide, from the United States to Japan. Builders of mercantile vessels follow quickly and the turbines of the Cunard liner RMS Mauretania (1906), each developing 26,000 kW, are the largest in existence at the time. The Mauretania holds the Blue Riband for the speediest Atlantic crossing until 1929, a fact that keeps Parsons’s name before the public.
The firm of C. A. Parsons (1889), which builds turbines for use on land, is privately owned, but the Parsons Marine Steam Turbine Company (1897) is a public company. Parsons also earns income from over 300 patents through the Parsons Foreign Patents Co. (1899). He readily licenses others to use his patents but he avoides costly litigation, the ruin of many inventors.
Parsons inherits an interest in optical instruments from his father. In 1890 he develops a cost-effective method for manufacturing searchlight mirrors, using sheets of plate glass and an iron mold heated in a gas furnace. During World War I he supplies most of the national requirements. In 1921 he acquires the optical instrument manufacturers Ross Ltd. and the Derby Crown Glass Company, makers of optical quality glass. In 1925 the firm of Howard Grubb, which makes large optical telescopes, is rescued from insolvency by Parsons. He believes that it is of national importance to maintain the industrial capacity to make optical equipment. Not all of his projects are commercially profitable, as for example his acoustic amplifier, dubbed the “Auxetophone,” or his attempts at synthesising diamonds, which absorbs much time and effort. In the development of his many inventions, he displays great tenacity in the face of reverses and always employs a meticulously scientific approach.
The supply of power on a large scale is revolutionised by the steam turbine. During the twenty years following the building of his first turbogenerator, Parsons remains at the forefront of promoting, building, and selling ever larger and more efficient turbines. He is not only a scientific engineer and inventor, but also a successful manufacturer and businessman. Modest and retiring in manner, his chief weakness lay in a lack of skill in managing interpersonal relationships, though this is compensated to a large extent by his integrity and loyalty. He seeks out the ablest men to run his businesses, among them several Fellows of the Royal Society (FRS). He is elected FRS himself in 1898 and is knighted in 1911. In 1927 he becomes the first engineer to be awarded the Order of Merit for his outstanding contributions to society. He is honoured by many universities and institutions in Europe and the United States.
Parsons marries Katharine Bethell, a Yorkshire woman, in 1883. They have one daughter and a son who dies on active service in 1918. He keeps a residence in London and in Northumbria.
Parsons dies on February 11, 1931, on board the steamship Duchess of Richmond while on a cruise with his wife. The cause of death is given as neuritis. A memorial service is held at Westminster Abbey on March 3, 1931. He is buried in the parish church of St. Bartholomew’s in Kirkwhelpington in Northumberland. His estate is valued at £1,214,355 gross.
Mary Ward (née King), Irish naturalist, astronomer, microscopist, author, and artist, is born in Ballylin near present-day Ferbane, County Offaly, on April 27, 1827. She is killed in 1869 when she falls under the wheels of an experimental steam car built by her cousins, thereby becoming the first person known to be killed by a motor vehicle.
King is the youngest child of the Reverend Henry King and his wife Harriette. She and her sisters are educated at home, as are most girls at the time. However, her education is slightly different from the norm because she is of a renowned scientific family. She is interested in nature from an early age, and by the time she is three years old she is collecting insects.
King is a keen amateur astronomer, sharing this interest with her cousin, William Parsons, 3rd Earl of Rosse, who builds the Leviathan of Parsonstown, a reflecting telescope with a six-foot mirror which remains the world’s largest until 1917. She is a frequent visitor to Birr Castle, producing sketches of each stage of the process. Along with photographs made by Parson’s wife, Mary Rosse, her sketches are used to aid in the restoration of the telescope.
King also draws insects, and the astronomer James South observes her doing so one day. She is using a magnifying glass to see the tiny details, and her drawing so impresses him that he immediately persuades her father to buy her a microscope. A compound microscope made by Andrew Ross is purchased for £48 12s 8d. This is the beginning of a lifelong passion. She begins to read everything she can find about microscopy, and teaches herself until she has an expert knowledge. She makes her own slides from slivers of ivory, as glass is difficult to obtain, and prepares her own specimens. The physicistDavid Brewster asks her to make his microscope specimens, and uses her drawings in many of his books and articles.
Universities and most societies do not accept women at the time, but King obtains information any way she can. She writes frequently to scientists, asking them about papers they had published. During 1848, Parsons is made president of the Royal Society, and visits to his London home allows her to meet many scientists.
When Ward writes her first book, Sketches with the microscope (privately printed in 1857), she apparently believes that no one will print it because of her gender or lack of academic credentials. She publishes 250 copies of it privately, and several hundred handbills are distributed to advertise it. The printing sells during the next few weeks, which prompts a London publisher to take the risk and contract for future publication. The book is reprinted eight times between 1858 and 1880 as A World of Wonders Revealed by the Microscope. A new full-colour facsimile edition at €20 is published in September 2019 by the Offaly Historical and Archaeological Society, with accompanying essays.
Her books are A Windfall for the Microscope (1856), A World of Wonders, Revealed by the Microscope (1857), Entomology in Sport, and Entomology in Earnest (1857, with Lady Jane Mahon), Microscope Teachings (1864), Telescope Teachings (1859). She illustrates her books and articles herself, as well as many books and papers by other scientists.
Ward is the first known automobile fatality. William Parsons’ sons had built a steam-powered car and on August 31, 1869, she and her husband are traveling in it with the Parsons boys, Richard Clere Parsons and the future steam turbine pioneer Charles Algernon Parsons, and their tutor, Richard Biggs. She is thrown from the car on a bend in the road at Parsonstown (present-day Birr, County Offaly). She falls under its wheel and dies almost instantly. A doctor who lives near the scene arrives within moments, and finds her cut, bruised, and bleeding from the ears. The fatal injury is a broken neck. It is believed that the grieving family destroys the car after the crash.
Ward’s microscope, accessories, slides and books are on display in her husband’s home, Castle Ward, County Down. William Parsons’ home at Birr Castle, County Offaly, is also open to the public.
Hamilton is born in Dublin on August 4, 1805, the fourth of nine children born to Sarah Hutton (1780–1817) and Archibald Hamilton (1778–1819). He is part of a small but well-regarded school of mathematicians associated with Trinity College, Dublin, which he enters at age eighteen. He is said to have shown immense talent at a very early age. Astronomer Bishop Dr. John Brinkley remarks of the 18-year-old Hamilton, “This young man, I do not say will be, but is, the first mathematician of his age.”
Trinity College awards him two Optimes, or off-the-chart grades. He studies both classics and mathematics and is appointed Professor of Astronomy just prior to his graduation. He then takes up residence at Dunsink Observatory where he spends the rest of his life.
Although Hamilton regards himself as a pure mathematician rather than a physicist, his work is of major importance to physics, particularly his reformulation of Newtonian mechanics, now called Hamiltonian mechanics. This work has proven central to the modern study of classical field theories such as electromagnetism, and to the development of quantum mechanics. In pure mathematics, he is best known as the inventor of quaternions.
Hamilton’s scientific career includes the study of geometrical optics, classical mechanics, adaptation of dynamic methods in optical systems, applying quaternion and vector methods to problems in mechanics and in geometry, development of theories of conjugate algebraic couple functions, solvability of polynomial equations and general quintic polynomial solvable by radicals, the analysis on Fluctuating Functions, linear operators on quaternions and proving a result for linear operators on the space of quaternions, which is a special case of the general theorem which today is known as the Cayley–Hamilton theorem. He also invents Icosian calculus, which he uses to investigate closed edge paths on a dodecahedron that visit each vertex exactly once.
Hamilton retains his faculties unimpaired to the very last, and steadily continues the task of finishing the Elements of Quaternions which occupies the last six years of his life. He dies in Dublin on September 2, 1865, following a severe attack of gout precipitated by excessive drinking and overeating. He is buried in Mount Jerome Cemetery in Dublin.
Parsons also performs some preliminary work in association with the practices of the electrodeposition of copper sulfate upon silver films circa 1865 while in search of the design for a truly flat mirror to use in a telescope. However, he finds it impossible to properly electroplate copper upon these silver films, as the copper contracts and detaches from the underlying glass substrate. His note has been cited as one of the earliest confirmations in literature that thin films on glass substrates experience residual stresses. He revives discussion in his work Nature’s August 1908 edition after witnessing similar techniques used to present newly devised searchlights before the Royal Society.
Although overshadowed by his father (when astronomers speak of “Lord Rosse”, it is almost always the father that they refer to), Parsons nonetheless pursues some astronomical observations of his own, particularly of the Moon. Most notably, he discovers NGC 2, a spiral galaxy in the constellationPegasus.
Wilson becomes interested in astronomy and travels to Oran in 1870 to photograph the solar eclipse. In 1871 he acquires a reflecting telescope of 12 inches (30.5 cm) aperture and sets it up in a dome in the gardens of Daramona House. He uses it to experiment on the photography of the moon with wet plates and also begins to study solar radiation using thermopiles. In 1881, he replaces the original telescope with a Grubb reflector of 24 inches (61 cm) aperture and a new dome and mounting that has an electrically controlled clock drive. The new telescope is mounted in a two-story tower attached to the house with an attached physical laboratory, darkroom and machine shop.
Wilson’s main research effort, in partnership with P.L. Gray, is to determine the temperature of the sun using a “differential radio-micrometer” of the sort developed by C.V. Boys in 1889, which combines a bolometer and galvanometer into one instrument. The result of their measurements is an effective temperature of about 8000 °C for the sun which, after correction to deal with absorption in the earth’s atmosphere, give a value of 6590 °C, compared to the modern value of 6075 °C.
Some of Wilson’s other astronomical projects include observations on the transit of Venus, determination of stellar motion, observations of sunspots and a trip to Spain to photograph a solar eclipse. He takes a great many excellent photographs of celestial bodies such as nebulae. His astronomical findings are published in a series of memoirs such as Experimental Observations on the Effective Temperature of the Sun.
Wilson dies on March 6, 1908 at Daramona at the relatively young age of 56, and is buried in the family plot in Steete churchyard. He had married Caroline Ada in 1886, the daughter of Capt. R.C. Granville, and they have a son and two daughters. His son donates his telescope to the University of London, where it is used for research and teaching, finally becoming a feature in Liverpool museum.
seamus dubhghaill 