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Tag Archives: Sulfuric Acid


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Birth of Henry Dixon, Biologist & Professor

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Henry Horatio Dixon, plant biologist and professor at Trinity College, Dublin, is born in Dublin on May 19, 1869. Along with John Joly, he puts forward the cohesion-tension theory of water and mineral movement in plants.

Dixon is the youngest of the seven sons of George Dixon, a soap manufacturer, and Rebecca (née Yeates) Dixon. He is educated at Rathmines School and Trinity College, Dublin. In 1894, after studying in Bonn, Germany, he is appointed assistant and later full Professor of Botany at Trinity. In 1906 he becomes Director of the Botanic Gardens and in 1910 of the Herbarium also. He has a close working relationship with physicist John Joly and together they develop the cohesion theory of the ascent of sap.

Dixon’s early research includes work on the cytology of chromosomes and first mitosis in certain plants. Familiarity with work on transpiration and on the tensile strength of columns of sulfuric acid and water leads Dixon and Joly to experiment on transpiration. “On the Ascent of Sap” (1894) presents the hypothesis that the sap or water in the vessels of a woody plant ascends by virtue of its power of resisting tensile stress and its capacity to remain cohesive under the stress of great differences of pressure. Dixon and Joly further demonstrate that water is transported through passive vessels and not living cells.

Dixon writes Transpiration and the Ascent of Sap in Plants (1914), which brings various theories and experimental works together in a coherent argument. He also writes a textbook, Practical Plant Biology (1922).

In 1907 Dixon marries Dorothea Mary, daughter of Sir John H. Franks, with whom he raises three sons. He is the father of biochemist Hal Dixon and grandfather of Adrian Dixon and Joly Dixon.

In 1908 Dixon is elected a Fellow of the Royal Society. In 1916 he is awarded the Boyle Medal of the Royal Dublin Society. He delivers the society’s Croonian Lecture in 1937.

Henry Dixon dies in Dublin on December 20, 1953.

(Pictured: Henry Horatio Dixon, bromide print by Walter Stoneman, 1922, National Portrait Gallery, London)


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Death of Robert John Kane, Chemist & Educator

robert-john-kane

Sir Robert John Kane, chemist and educator, dies at the age of 80 in Dublin on February 16, 1890. In a distinguished career, he founds the Dublin Journal of Medical  & Chemical Science, is Vice-Chancellor of Royal University of Ireland and is director of the Museum of Irish Industry.

Kane is born at 48 Henry Street, Dublin on September 24, 1809 to John and Eleanor Kean (née Troy). His father is involved in the Irish Rebellion of 1798 and flees for a time to France where he studies chemistry. Back in Dublin, Kean (now Kane) founds the Kane Company and manufactures sulfuric acid.

Kane studies chemistry at his father’s factory and attends lectures at the Royal Dublin Society as a teenager. He publishes his first paper in 1828, Observations on the existence of chlorine in the native peroxide of manganese, in the London Quarterly Journal of Science, Literature and Art. The following year, his description of the natural arsenide of manganese results in the compound being named Kaneite in his honour. He studies medicine at Trinity College, Dublin, graduating in 1834 while working in the Meath Hospital. He is appointed Professor of Chemistry at the Apothecaries’ Hall, Dublin in 1831, which earns him the moniker of the “boy professor.” In the following year he participates in the founding of the Dublin Journal of Medical & Chemical Science.

On the strength of his book Elements of Practical Pharmacy, Kane is elected to the Royal Irish Academy in 1832. He studies acids, shows that hydrogen is electropositive, and proposes the existence of the ethyl radical. In 1836 he travels to Giessen in Germany to study organic chemistry with Justus von Liebig. In 1843 he is awarded the Royal Irish Academy’s Cunningham Medal for his work on the nature and constitution of compounds of ammonia.

Kane publishes a three-volume Elements of Chemistry in 1841–1844, and a detailed report on the Industrial Resources of Ireland. This includes the first assessment of the water power potential of the River Shannon, which is not realised until the 1920s at Ardnacrusha.

Kane becomes a political adviser on scientific and industrial matters. He serves on several commissions to enquire into the Great Irish Famine, along with Professors Lindley and Taylor, all more or less ineffective. His political and administrative work means that his contribution to chemistry ceases after about 1844.

Kane’s work on Irish industry leads to his being appointed director of the Museum of Irish Industry in Dublin in 1845. The Museum is a successor to the Museum of Economic Geology, and is housed at 51 St. Stephen’s Green.

Also in 1845 Kane becomes the first President of Queen’s College, Cork (now University College Cork). He does not spend a lot of time in Cork as he has work in Dublin, and his wife lives there. The science building on the campus is named in his honour. He is knighted in 1846.

In 1873 Kane takes up the post of National Commissioner for Education. He is elected president of the Royal Irish Academy in 1877, holding the role until 1882. In 1880 he is appointed the first chancellor of the newly created Royal University of Ireland. After a motion to admit women to the University, put forward by Prof. Samuel Haughton at Academic Council in Trinity College Dublin, March 10, 1880, Kane is appointed to a committee of ten men to look into the matter. He is opposed to the admission of women, and nothing is reported from the committee in the Council minutes for the next ten years.