Telescopes - Early works to 1800

Works from the collections

5 works

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An essay on the genuine construction of a standard microscope and telescope With the application of a prismatic or catadioptric eye-piece to refracting and reflecting telescopes, by which their lengths are much contracted, their fields of view encreased, and their uses greatly facilitated; particularly in the reflector of Cassegrain's form for celestial observations. By B. Martin.
Martin, Benjamin, 1705-1782.Date: MDCCLXXVI. [1776]
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Description d'un nouvel instrument, appellé Equatorial universel, fait par M. J. Ramsden à Londres, avec la Manìcre de l'ajuster pour s'en servir. ..
Ramsden, J. (Jesse), 1735-1800.Date: 1773]
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Two essays on the nature and wonderful properties of Island Crystal . Essay I. Containing, all that has been hitherto delivered in regard to its form, dimensions, and double refraction of light; with the addition of several new experiments with polished parallelopipeds and prisms made of this substance, which discover a various, multiple, and colorific refraction; and exhibit a variety of images of one and the same object. To which is subjoined, a computation of the magnifying power of reflecting telescopes; and a table thereof, from 6 inches to 12 feet in length. The whole illustrated with copper plate figures. By Benjamin Martin.
Martin, Benjamin, 1705-1782.Date: [1774?]
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January 1773. Description of a new universal equatoreal, made by Mr. J. Ramsden, with the method of adjusting it for observation
Ramsden, J. (Jesse), 1735-1800.Date: 1773]
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Description of a new universal equatoreal, made by Ramsden, with the method of adjusting it for observation. As also instructions for making observations with it
Ramsden, J. (Jesse), 1735-1800.Date: 1779]