The microscope made easy: or, I. The nature, uses and magnifying powers of the best kinds of microscopes ... II. An account of what surprizing discoveries have been already made by the microscope .. (1754)
Baker, Henry, 1698-1774 · London, Printed for R. and J. Dodsley, and sold by M. Cooper · leaf 45
Biff ^■ HiUeM-l … The Double RefcBhtg Microfcope, 17 or lower, turn the Screw of the Magnifier,gradually, till the Object appears diftinft.—Take Notice, that the greateft Magnifiershave the linalleft Apertures and the loweflNumbers. L. is a circular Plate of Brafs, fixt hori-zontally between the three Brafs Pillars,…
Microscopy
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