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John Thomas Towson (1804–81): His Contributions to Navigation

Published online by Cambridge University Press:  23 November 2009

Extract

This paper was presented at a meeting of the Bristol Channel Branch of the Institute i n Cardiff on 28 April 1976.

The work and life of John Thomas Towson falls neatly within the professional group so aptly styled by the late Professor E. G. R. Taylor as the Mathematical Practitioners. Born in Devonport in 1804, Towson was educated at Stoke Classical School in that town and on leaving school followed his father's trade as a chronometer maker. When only 22 years of age Towson invented a device for banking the balance of a chronometer and his invention was communicated to the Society of Arts in 1826.

Type
Research Article
Copyright
Copyright © The Royal Institute of Navigation 1977

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References

REFERENCES

1Taylor, E. G. R. (1954). The Mathematical Practitioners of Tudor and Stuart England 1485–1714, and its sequel (1966) The Mathematical Practitioners of Hanoverian England 1974–1840. Cambridge.Google Scholar
2‘Banking’ the balance of a chronometer is necessary to prevent the balance from making more than a full turn, in which case it would trip the escapement. Vide Gould, R. T. (1923). The Marine Chronometer: Its History and Development, p. 214. London.Google Scholar
3The daguerrotype process employs a copper plate coated with silver iodide which is exposed to light. After the exposure the plate is fumed with mercury vapour and the image is then fixed by a solution of common salt. The process was developed jointly by Daguerre and his compatriot J-N. Niepce.Google Scholar
4Anon. (1860). Great Circle or Tangent Sailing. The English Cyclopaedia (Conducted by Knight, Charles). London.Google Scholar
5Raper, H. (1840). The Practice of Navigation and Nautical Astronomy. London.Google Scholar
6Cotter, C. H. (1973). Henry Raper's Spherical Transverse Table. This Journal, 26, 240.Google Scholar
7Herschel Papers. Vol. 17. Royal Society Archives, Letter No. 358. Herschel to Towson. 24 August, 1846.Google Scholar
8Herschel Papers, Vol. 17. Royal Society Archives. Letter No. 359. Towson to Herschel. 1 September 1846.Google Scholar
9Towson, J. T. (1848). Tables to Facilitate the Practice of Great Circle Sailing. London.Google Scholar
10Herschel Papers. Vol. 17. Royal Society Archives. Letter No. 360. Towson to Herschel. 22 December 1847.Google Scholar
11Towson, J. T. (1849). Tables for the Reduction of Ex-Meridian Altitudes. London. (20th edition 1906).Google Scholar
12Vide The Report of the British Association Meeting. The Athenaeum. No. 1406. 7 October 1854. p. 1205.Google Scholar
13The Liverpool Compass Committee made three Reports which were presented to both Houses of Parliament. The First and Second were published in 1857 and the Third Report was published in 1861.Google Scholar
14Towson, J. T. (1863). Practical Information on the Deviation of the Compass for the Use of Masters and Mates of Iron Ships. London.Google Scholar
15Airy Papers. Royal Greenwich Observatory Archives. Correction of Compass in Iron Ships 1868–75. D/2/61. P.R.O. ref. RGOMS 1266. Thomas Gray to the Astronomer Royal. 19 March 1870.Google Scholar
16Airy Papers, op. cit. G. B. Airy to Assistant Secretary, Marine Department, Board of Trade. 21 March 1870.Google Scholar
17Airy Papers, op. cit. J. T. Towson to G. B. Airy. 28 September 1871.Google Scholar
18Airy Papers, op. cit. Thomas Gray to Secretary, Local Marine Board, Liverpool.Google Scholar
19Anon. (1897). The Editor's Album. The Nautical Magazine. Vol. 66. Glasgow.Google Scholar