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, (Printed for, and sold by the author, No. 171, Fleet-street,, 1776)