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Henry Clifton Sorby

Henry Clifton Sorby (10 May 1826 – 9 March 1908) was an English amateur microscopist and geologist. His major contribution was the development of techniques for thin sectioning of rocks and minerals with polarized light under a microscope which was also extended to study iron and steel, his family having being involved in the Sheffield iron and steel industry for generations. He also contributed to the study of meteorites by introducing a method of blowpipe analysis where molten beads were flattened for microscopic study. He was elected Fellow of the Royal Society in 1857.

Henry Clifton Sorby
Henry Clifton Sorby. Portrait in Mappin Hall, University of Sheffield
Born(1826-05-10)10 May 1826
Woodbourne near Sheffield in Yorkshire, England
Died9 March 1908(1908-03-09) (aged 81)
Sheffield, England
AwardsWollaston Medal (1869)
Royal Medal (1874)

Biography

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Early life

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Sorby was born at Woodbourne, near Sheffield in Yorkshire, to Henry Sorby (1790-1846) and Amelia (d. 1872). His father Henry was one of twelve children of John Sorby (1775-1829) of Spital Hill, Sheffield and Elizabeth Swallow (1761-1829) of Attercliffe Forge, Sheffield. The family had a business in iron production from the early 17th century. An older sister of his father Henry, Anne had married Henry Hartop, a Sheffield steel industry manager. He had built Woodbourn House where Sorby's father and lived from 1822. While another uncle John Francis married Hartop's daughter Amelia, yet another, Alfred married Amelia's sister Ann Lambert. The family was thus deeply connected in the Sheffield industry. They also owned land at the Orgreave Hall Estate where there were coal seams and sandstone quarries. Sorby attended Sheffield Collegiate School leaving it in 1841. He early on developed an interest in natural science through the influence of his father who had an interest in geology, as well as the private tutor Rev. Walter Mitchell who had graduated from Cambridge. He also studied German around 1845, possibly under William Fochlander and this would allow Sorby to study the work of Justus von Liebig. One of his first papers related to the excavation of valleys in Yorkshire. In 1847, when he was 21, his father died, leaving him a comfortable private income. He immediately established a scientific laboratory and workshop at his home.[1]

Petrography

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Sorby had an interest in geology and was involved in the Geological and Polytechnic Society between 1845 and 1846. He subsequently dealt with the physical geography of former geological periods, with the wave-structure in certain stratified rocks, and the origin of slaty cleavage.[2]

Sorby began to produce thin slices of hard rocks based on the methods used in zoology that he had learned from professor William Crawford Williamson. He also began to use polarized light to examine the thin transparent sections of rocks. He took up the study of rocks and minerals under the microscope, and published an important memoir, "On the Microscopical Structure of Crystals", in 1858 (Quart. Journ. Geol. Soc.).[3][4] He then introduced spectrographic analysis techniques.[5] In England, he was one of the pioneers in petrography; he was awarded the Wollaston medal by the Geological Society of London in 1869, and became its president. In his presidential addresses, Sorby gave the results of original research on the structure and origin of limestones and of non-calcareous stratified rocks (1879–1880).[2][6]

In the mid-Victorian years, Sorby was also the first to study the cleavage of slates using a microscope. In the frame of an ardent debate on the origin and mechanism of the slatey cleavage with the Irish physicist John Tyndall, who was also a pioneering mountain climber (Tyndall name is also associated with the "Golden age of alpinism") and visited the Alps mountains in 1856 for scientific reasons, Sorby devised a quote now famous:

Mountains must indeed be examined with the microscope.[7]

Sorby was one of the first to understand the role and the importance of microscopic processes to explain material deformation and large scale phenomena such as rock cleavage and rock folding caused by tectonic uplift and orogeny.[8]

He studied the microscopical structure of meteorites.[9]

In the summer of 1876 at South Kensington, he gave a lecture to science teachers on microscopes.[10]

Metallography

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In 1863, he used etching with acid to study the microscopic structure of iron and steel. Using this technique, he was the first in England to understand that a small but precise quantity of carbon gave steel its strength.[11] His metallographic observations allowed to scientifically confirm the merits and the soundness of the process patented by Henry Bessemer in 1855, and improved by Robert Forester Mushet in 1856, for mass-production of steel. Due to this accomplishment, Sorby is known to modern metallurgists as the "father of metallography", with an award bearing his name being offered by the International Metallographic Society for lifetime achievement.

Marine sciences

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His interests were broad. After buying a yacht, "The Glimpse",[12] he also studied sedimentology and marine biology. Sorby examined ripples in sedimentary rocks and examined their orientations in different layers thus pioneering the study of paleocurrents.[13] He also measured the temperature of the water in estuaries. He published essays on the construction and use of the micro-spectroscope in the study of matter colouring marine animals and vegetable.[2] He also applied his skill in making preparations of marine invertebrate animals for lantern slides. Furthermore, he once estimated "one cubic thousandth of an inch of water to contain 3.7 × 1015 molecules."[14]

Fellow of scientific societies

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In 1857, aged only 31, he was elected a Fellow of the Royal Society (FRS) in recognition of this work on slaty cleavage.[11]

He was president of the Royal Microscopical Society. In 1882, he was elected president of Firth College, Sheffield after the death of founder Mark Firth.[2] Sorby also worked hard for the establishment of the University of Sheffield, which was eventually founded in 1905. A university hall of residence, Sorby Hall, built in the 1960s and demolished in August 2006, was named after him.

Death

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He died in Sheffield and was buried in Ecclesall churchyard.

Honours and awards

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He was elected a Fellow of the Royal Society in June 1857 as one who was Author of various papers on Slaty Cleavage; on the peculiarities of stratification due to the action of currents & their application to the investigation of the Physical Geography of ancient periods; on the microscopical structure of limestones and other peculiarities of the physical & chemical constitution of rocks. Distinguished for his acquaintance with the science of Geology.[15] He delivered their Bakerian Lecture in 1863 for his work on the Direct Correlation of mechanical and Chemical Forces and was awarded their Royal Medal in 1874. In 1892, Sorby was elected a Foreign Honorary Member of the American Academy of Arts and Sciences.[16]

Both the International Association of Sedimentologists and the Yorkshire Geological Society have Sorby Medals named in honour of his achievements in geology. The Henry Clifton Sorby Award is offered by the International Metallographic Society in recognition of lifetime achievement in metallurgy. The University of Sheffield has a chair of geology/physical geology named after him and the Sorby Natural History Society [1] is named after Sorby. The area in which the society operates (north East Derbyshire, the Sheffield and Chesterfield areas) are known to members as 'Sorbyshire'.

The Dorsa Sorby wrinkle ridge system on the Moon is named after him. There is also a wing at the Northern General Hospital in Sheffield (South Yorkshire) named after him.

See also

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References

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  1. ^ Bishop, Michael J. (1984). "New Biographical Data on Henry Clifton Sorby (1826 - 1908)". Earth Sciences History. 3 (1): 69–81. ISSN 0736-623X.
  2. ^ a b c d Chisholm 1911.
  3. ^ Sorby, H. C. (1 February 1858). "On the microscopical structure of crystals indicating the origin of minerals and rocks". Quarterly Journal of the Geological Society. 14 (1–2): 453–500. doi:10.1144/GSL.JGS.1858.014.01-02.44. ISSN 0370-291X. S2CID 128592719.
  4. ^ Folk, Robert L. (1 April 1965). "Henry Clifton Sorby (1826–1908), the Founder of Petrography". Journal of Geological Education. 13 (2): 43–47. doi:10.5408/0022-1368-XIII.2.43. ISSN 0022-1368.[dead link‍]
  5. ^ Judd, John W. (1908). "Henry Clifton Sorby. 1826–1908". Journal of the Royal Microscopical Society. 28 (4): 431–435. doi:10.1111/j.1365-2818.1908.tb04877.x. ISSN 0368-3974.
  6. ^ Folk, Robert L. (1 April 1965). "Henry Clifton Sorby (1826–1908), the Founder Of Petrography". Journal of Geological Education. 13 (2): 43–47. doi:10.5408/0022-1368-XIII.2.43. ISSN 0022-1368.
  7. ^ Sorby, H. C. (August 1856). "XVIII. On the theory of the origin of slaty cleavage". The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science. 12 (77): 127–129. doi:10.1080/14786445608642149.
  8. ^ Sorby, Henry Clifton (1856). "III. On slaty cleavage, as exhibited in the Devonian limestones of Devonshire". The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science. 11 (69): 20–37. doi:10.1080/14786445608642017. ISSN 1941-5982.
  9. ^ "XII. On the microscopical structure of meteorites". Proceedings of the Royal Society of London. 13: 333–334. 31 December 1864. doi:10.1098/rspl.1863.0075. ISSN 0370-1662. S2CID 131171184.
  10. ^ "Microscopes by H. C. Sorby". Science Lectures at South Kensington. Vol. I. London: Macmillan & Company. 1878. pp. 193–215.
  11. ^ a b "Biography of Henry Clifton Sorby". Archived from the original on 5 February 2012. Retrieved 22 May 2012.
  12. ^ "Sorby, Henry Clifton". Who's Who. 1903. p. 1289.
  13. ^ Middleton, Gerard V. (1978), "Sedimentologists: Henry Clifton Sorby (1826–1908)", Sedimentology, Springer Berlin Heidelberg, pp. 1074–1075, doi:10.1007/3-540-31079-7_204, ISBN 978-0-87933-152-8, retrieved 27 September 2024
  14. ^ Scientific American. Munn & Company. 1 April 1882. p. 201.
  15. ^ "Library and Archive Catalogue". Royal Society. Retrieved 20 October 2010.[permanent dead link‍]
  16. ^ "Book of Members, 1780–2010: Chapter S" (PDF). American Academy of Arts and Sciences. Retrieved 11 September 2016.

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Further reading

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