The microscope; an introduction to the microscopic methods and to histology (1911)
Gage, Simon Henry, 1851-1944 · [Ithaca, N.Y.] The Comstock Publishing Company · leaf 69
ser must be continuous with thatof the microscope (see frontispiece) and the object must be in thefocus of the condenser, i.e., at the apex qf the cone of light givenby the condenser. The centering is most conveniently accomplished as follows al-though daylight may be used with almost equal… … CH. II] LIGHTING AND FOCUSING 51 of stiff, black paper. Care must be taken, however, to make theopening exactly central. This is best accomplished by putting thepaper disc over the iris or metal diaphragms and then making the holein the center of the small circle.uncovered by the metal diaphragmFor…
Microscopy
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