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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 -
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 -
Uraniscopium magnum, or The nature, construction, and use of the grand uraniscope
Being a new construction of an equatorial telescope, which, by clock-work, and a planetary pendulum, becomes an automaton, and renders all the heavenly bodies stationary to the view. By B. Martin