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.
Purser is born in Dublin on August 24, 1835, the son of John Tertius Purser (1809–1893), the general manager of the well-known A Guinness, Son & Co. brewery, and Anna Benigna Fridlezius (1803-1881). He is educated in a wealthy family, which includes artists, as his cousin Sarah Purser, or engineers, as his brother-in-law John Purser Griffith. He is the brother of mathematician Frederick Purser. He receives his early education at the private boarding school run by his uncle, Dr. Richard W. Biggs, at Devizes, Wiltshire. He completes his schooling at Devizes and begins his university studies at Trinity College, Dublin, graduating BA in mathematics in 1856. He is the best mathematician of his year at the University and in 1855 he gains the Lloyd Exhibition.
Purser becomes a tutor to the four sons of William Parsons, 3rd Earl of Rosse (1800-1867) in 1857. Lord Rosse’s 72-inch reflecting telescope, built in 1845 and colloquially known of as the “Leviathan of Parsonstown,” is the world’s largest telescope when it is built and continues to hold this distinction until the early 20th century. As well as acting as tutor to the children, Purser does become involved in Lord Rosse’s interest in astronomy but never does any observing.
In 1863, Purser is appointed professor of mathematics at Queen’s College, Belfast, a position he maintains until his retirement in 1901.
Purser never marries. When his father dies on April 5, 1893, Rathmines Castle passes to him. He dies at Rathmines Castle on October 18, 1903, a very wealthy man. In his will he leaves £100,000 to his brother Frederick Purser, £40,000 to his sister Anna Griffith and £5,000 to each of her children. In addition to the money, he owns property in Blessington Street, Essex Street and Eustace Street which he leaves to his brother-in-law John Purser Griffith. Other properties and interests that he owns he divides between his brother Frederick and his sister Anna. After his death, his sister Anna and her husband John Purser Griffith move into Rathmines Castle although, at this time, its ownership has gone to Frederick Purser. After Frederick dies in August 1910, the Castle and his considerable wealth passes to Anna.
(Pictured: Portrait of John Purser painted by the artist Sarah Purser, daughter of Tertius Purser’s brother Benjamin Purser. The portrait hangs in Queen’s College, Belfast.)
The Electricity Supply Board (ESB; Irish: Bord Soláthair an Leictreachais), a state-owned electricity company operating in the Republic of Ireland, is established on August 11, 1927, by the fledgling Irish Free State government under the Electricity (Supply) Act 1927, to manage Ireland’s electricity supply after the successful Shannon hydroelectric scheme at Ardnacrusha and take over all existing projects for the electrification of Ireland. While historically a monopoly, the ESB now operates as a commercial semi-state concern in a “liberalised” and competitive market. It is a statutory corporation whose members are appointed by the government of Ireland.
The Shannon hydroelectric scheme at Ardnacrusha is Ireland’s first large-scale electricity plant and, at the time, it provides 80% of the total energy demands of Ireland. To give an idea of the growth in demand, the output of Ardnacrusha is now approximately two per cent of national peak demand for power.
By 1937, plans are being finalised for the construction of several more hydroelectric plants. The plans called for stations at Poulaphouca, Golden Falls, Leixlip (all in Leinster), Clady, Cliff and Cathaleen’s Fall (between Belleek and Ballyshannon in County Donegal), Carrigadrohid and Inniscarra (in County Cork). All these new plants are completed by 1949 and together harness approximately 75% of Ireland’s inland waterpower potential. Many of these plants are still in operation, however, as can be expected with continuing growth in demand, their combined capacity falls far short of Ireland’s modern needs.
With Ireland’s towns and cities benefiting from electricity, the new government pushes the idea of Rural Electrification. Between 1946 and 1979, the ESB connects in excess of 420,000 customers in rural Ireland. The Rural Electrification Scheme is described as “the Quiet Revolution” because of the major socio-economic change it brings about. The process is greatly helped in 1955 by the Electricity Supply Amendment Act, 1955.
In 1947, the ESB, needing ever more generation capacity, builds the North Wall station on a 7.5-acre site in Dublin‘s industrial port area on the north side of the River Liffey on the site of an old oil refinery. The original station consists of one 12.5 MW steam turbine that is originally purchased for a power station at Portarlington but instead used at North Wall. Other power stations built around this time include the peat fired stations at Portarlington, County Laois, and Allenwood, County Kildare.
Because of the risks of becoming dependent on imported fuel sources and the potential for harvesting and utilising indigenous peat, the ESB – in partnership with Bord na Móna – establishes those stations and ESB also builds Lanesboro power station in 1958. Located in County Longford, the plant burns peat, cut by Bord na Móna in the bogs of the Irish midlands. In 1965, the Shannonbridge station, located in County Offaly, is commissioned. The two stations have been replaced by new peat-fired stations near the same locations, and peat is also used to power the independent Edenderry Power Station in County Offaly.
As in most countries, energy consumption is low at night and high during the day. Aware of the substantial waste of night-time capacity, the ESB commissions the Turlough Hillpumped-storage hydroelectric station in 1968. This station, located in County Wicklow, pumps water uphill at night with the excess energy created by other stations, and releases it downhill during the day to turn turbines. The plant can generate up to 292 MW of power, but output is limited in terms of hours because of the storage capacity of the reservoir.
The 1970s bring about a continued increase in Ireland’s industrialisation and with it, a greater demand for energy. This new demand is to be met by the construction of the country’s two largest power stations – Poolbeg Generating Station in 1971 and Moneypoint Power Station in 1979. The latter, in County Clare, remains Ireland’s only coal-burning plant and can produce 915 MW, just shy of the 1015 MW capacity of Poolbeg. In 2002 and 2003, new independent stations, Huntstown Power (north Dublin) and Dublin Bay Power (Ringsend, Dublin), are constructed.
In 1991, the ESB establishes the ESB Archive to store historical documents relating to the company and its impact on Irish life.
On September 8, 2003, two of the last remaining places in Ireland unconnected to the national grid – Turbot Island and Inishturk Island (off the coast of County Galway)- are finally connected to the main supply. Some islands are still powered by small diesel-run power stations.
Sixty wind farms are currently connected to the power system and have the capacity to generate 590 MW of power, depending on wind conditions. These wind farms are mainly owned by independent companies and landowners.
On March 16, 2005, the ESB announces that it is to sell its ShopElectric (ESB Retail) chain of shops, with the exception of the Dublin Fleet Street and Cork Academy Street outlets, to Bank of Scotland (Ireland), converting them into main street banks. Existing staff are offered positions as bank tellers.
On March 27, 2008, the ESB announces a €22bn capital investment programme in renewable energy technology, with the aim to halve its carbon emissions within 12 years and achieve carbon net-zero by 2035.
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.
Purser is the son of John Tertius Purser (1809–1893), the general manager of the well known A Guinness, Son & Co. brewery, and Anna Benigna Fridlezius (1803-1881). He is educated in a wealthy family, which includes artists, as his cousin Sarah Purser, or engineers, as his brother-in-law John Purser Griffith. He is the brother of mathematician Frederick Purser. He receives his early education at the private boarding school run by his uncle, Dr. Richard W. Biggs, at Devizes, Wiltshire. He completes his schooling at Devizes and begins his university studies at Trinity College, Dublin, graduating BA in mathematics in 1856. He is the best mathematician of his year at the University and in 1855 he gains the Lloyd Exhibition.
Purser becomes a tutor to the four sons of William Parsons, 3rd Earl of Rosse (1800-1867) in 1857. Lord Rosse’s 72-inch reflecting telescope, built in 1845 and colloquially known of as the “Leviathan of Parsonstown,” is the world’s largest telescope when it is built and continues to hold this distinction until the early 20th century. As well as acting as tutor to the children, Purser does become involved in Lord Rosse’s interest in astronomy but never does any observing.
In 1863, Purser is appointed professor of mathematics at Queen’s College, Belfast, a position he maintains until his retirement in 1901.
Purser never marries. When his father dies on April 5, 1893, Rathmines Castle passes to him. He dies at Rathmines Castle on October 18, 1903, a very wealthy man. In his will he leaves £100,000 to his brother Frederick Purser, £40,000 to his sister Anna Griffith and £5,000 to each of her children. In addition to the money, he owns property in Blessington Street, Essex Street and Eustace Street which he leaves to his brother-in-law John Purser Griffith. Other properties and interests that he owns he divides between his brother Frederick and his sister Anna. After his death, his sister Anna and her husband John Purser Griffith move into Rathmines Castle although, at this time, its ownership has gone to Frederick Purser. After Frederick dies in August 1910, the Castle and his considerable wealth passes to Anna.
(Pictured: Portrait of John Purser painted by the artist Sarah Purser, daughter of Tertius Purser’s brother Benjamin Purser. The portrait hangs in Queen’s College, Belfast.)
Mary Ward, Anglo-Irish amateur scientist, is killed on August 31, 1869, when she falls under the wheels of an experimental steam car built by her cousins. As the event occurs in 1869, she is the world’s first person known to be killed by a motor vehicle.
During the 19th century, when most women have little encouragement for a science education, Mary is unusual. She is born Mary King in present-day Ferbane, County Offaly on April 27, 1827, the youngest child of Henry and Harriett King. 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.
Universities and most societies do not accept women, but Mary obtains information any way she can. She writes frequently to scientists, asking them about papers they have published. During 1848, her cousin William Parsons, 3rd Earl of Rosse, is made President of the Royal Society, enabling her to meet many scientists during visits to his home.
Parsons’ sons build a steam-powered car. It is thought at the time that steam transport will be developed greatly during the near future. This becomes true for trains but does not become true for cars due to the development of internal combustion engine. Steam cars are heavy, and they do too much damage to the already uneven roads. In 1865, the Red Flag Acts imposes a speed limit of four miles per hour for the countryside and two miles per hour in towns. This effectively ends the popularity of motorcars, but some enthusiasts still have one, often homemade, like the Parsons’ vehicle.
On August 31, 1869, Mary and her husband, Henry, are travelling in it with the Parsons boys, Richard Clare 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, 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.
seamus dubhghaill 