Title: Optical essays /
Authors: Martin, Benjamin, 1705-1782.
Publisher: Printed for, and sold by the author ... ,
Year: 1765
Subjects: Optical instruments Early works to 1800.
Contents: (from t.p.) I. A practical description of the several sorts of single, solar, and compound microscopes -- II. The nature of vision in insects demonstrated by microscopic observations -- III. A catalogue of all the principal microscopic objects -- IV. The use of the reflecting telescope as an universal perspective -- V. The manner of computing the magnifying power in single and double microscopes -- VI. A new method of applying a micrometer to take the dimensions of small objects -- VII. An illustration of the whole in a great variety of figures on a large copper-plate.