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Radcliffe Tracts 44 (6)Hardy, Samuel
A Translation of Scherffer's Treatise on the Emendation of Dioptical Telescopes
In which Dollond's Theorem is Synthetically and Analytically demonstrated, - and extended to Glasses of various Kinds, and applied to Microscopes; several Methods for determining the different Refractive Powers of different Kinds of Glass are explained; and Tables are given for finding the proper Radii of Concavity and Convexity for any Compound Glass of a given Focus. To which are added, Explanatory Notes; and a Description of a Telescope to be used at Sea, for discovering the Longitude there. London: Printed for George Peach, at no. 12 Cheapside, 1768.
[1934-41]
1768