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John Caulfield Hannyngton

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John Caulfield (Caufield?) Hannyngton was a British military commander and mathematician.



Slide rule with cursor, designed by Hannyngton and manufactured by Aston & Mander, in wooden case 33" long x 9 5/8" wide x 2" deep

Hannyngton (Astronomical) Slide Rule Made in England, Mfg by Aston-Mander Size: 32 inches x 7.5 inches x 3/4 inch

John Caulfield Hannyngton, Major General - (1807-1886) Tyrone,UK. Inventor of the Hannyngton Slide Rule used in astronomical computations. Son of Thomas Knox Hannyngton of Dungannon and father of John Child Hannyngton. Fellow of the Institute of Actuaries. His best known and largest work is a Table of Haversines, Natural and Logarithmic, used in computing distances for the Nautical Almanac.


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