An Essay on Visual Glasses, (vulgarly Called Spectacles) Wherein it is Shewn, From the Principles of Optics, and the Nature of the eye, That the Common Structure of Those Glasses is Contrary to the Rules of art, to the Nature of Things ed 4

The 18th century was a wealth of knowledge, exploration and rapidly growing technology and expanding record-keeping made possible by advances in the printing press. In its determination to preserve the century of revolution, Gale initiated a revolution of its own: digitization of epic proportions to preserve these invaluable works in the largest archive of its kind. Now for the first time these high-quality digital copies of original 18th century manuscripts are available in print, making them highly accessible to libraries, undergraduate students, and independent scholars.
Medical theory and practice of the 1700s developed rapidly, as is evidenced by the extensive collection, which includes descriptions of diseases, their conditions, and treatments. Books on science and technology, agriculture, military technology, natural philosophy, even cookbooks, are all contained here.
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The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to insure edition identification:
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John Rylands University Library of Manchester

N009399

A catalogue of philosophical, optical, and mathematical instruments, made and sold by Benjamin Martin" pp.[28]-32.

London: printed for the author, and sold at his house, 1758. 32p., plate; 8°