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 / By Henry Baker.

  • Henry Baker
Date:
1744
Catalogue details

Licence: Public Domain Mark

Credit: 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 / By Henry Baker. Source: Wellcome Collection.

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    be pleafed to know certainly what the Pow- ers of their Glafiecs are, and confequently what may be expected from them, it would -be much better if the Micro/cope-Makers would grind their Glaffes according to fome fettled Standard, and not work by guefs, as they ufually do at prefent, whereby no two Sets of Magnifiers can be fuppofed exactly alike. Such a Standard, which would afford a very ufeful Set of Glafles, magnifying one more than another in due Degrees, is, I think, as follows, — khong The FOCAL DISTANCES of Six. Magnifiers for Mr. Witson’s Pocket Microfcope. . . Magnifiesthe Q Superficies, 1. } (‘sor OF 24 --169,000 a zon OFS | =| Dift. of e i == 10,000 | |; pthe Fo-. es 4% 4, ]eusat--j = 16] 2h —s Sone 5.0 e or 30 | ¢ heen eel 64. - XE, 90r 50d 256. D4 ny f