Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 225
not so soon broughtto a focus. The correct focal adjustment of the Mirror may bejudged by its formation of images of window-bars, chimneys,&c, upon any semi-transparent medium placed in the plane of theobject. It is only, however, when small objects are being viewed 170 MANAGEMENT OF THE… … Arrangement of Microscope for Transparent Objects. this mode be equally illuminated. The diffusion of the light overa larger area may be secured, either by shifting the Mirror so muchabove or so much below its previous position, that the pencil willfall upon the object whilst still converging, or…
Microscopy · Biology
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