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John Imison ( -1788) was a 'very ingenious mechanic', clock and watch maker, optician, 'philosophical instrument' maker, and author.
He worked in Manchester in the period 1783-85.
1785 Advertisement. Author of the 'School of Arts' and 'An Introduction to Useful Knowledge' offers Sun Dials, Electrical Machines etc.
1785 - at Black Swan Yard, Smithy Door, Manchester, by 1786 he had moved to 58 Haymarket, London.
1787 Wrote The School of Arts. In the context of mechanics, it was possibly the first published work to recommend the epicycloidal form of gear teeth.
1788 August 16th. Died in London and buried St. James', Westminster