Beale, Lionel S. (Lionel Smith), 1828-1906 · London, Harrison · leaf 34
en required. Meohakioal Pomion op the MioaosooPE. In directing attention to the mechanical arrangements of themicroscope, I must say a few words upon the adjustments foraltering the focus, the body of the instrument, and the stage. 10. Adjustments for altering the Poous.—The ordinary move-ment is… … Ilg. 6. Objertive, witli low an^rle of aperture bab. Aiiotlier wiUiliigh [iiitjleof aperture b ab.iig. 7- Tu illustrate spherical aberration, Tlie rays a a being; more refiactetl than those near the centre b, are brought to a focus nearer the lens.Fig. 8. To iUustrnte chromaticaberration. The…
Microscopy
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![An illustration from Essai de physique, par Mr. Pierre van Musschenbroek ... avec une description de nouvelles sortes de machines pneumatiques, et un recueil d'expériences par Mr. J. v[an] M[usschenbroek] Traduit du hollandois par Mr. Pierre Massuet .. (1751)](https://img.insideoutlibrary.com/img/200/ia-essaidephysiquep02muss-146-38.webp)
