John Dollond

Description and uses of the new invented universal equatorial instrument, or, portable observatory. With the divided object-glass micrometer. Made by P. and J. Dollond, opticians to His Majesty, in St. Paul's Churchyard, London

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Directions for using the new improved Hadley's quadrant; with the new method of adjusting the glasses for the back observation, etc

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The Life of John Dollond, F.R.S. Inventor of the Achromatic Telescope

With a Copious Appendix of All the Papers Referred to

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A Translation of Scherffer's Treatise on the Emendation of Dioptrical Telescopes

In which Dolland's Theorem is Synthetically and Analytically Demonstrated, - 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

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The Philosophical Transactions

Giving Some Account of the Present Undertakings, Studies, and Labours, of the Ingenious, in Many Considerable Parts of the World. Vol. L, Part II for the Year 1758

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