The microscope; an introduction to microscopic methods and to histology (1901)
Gage, Simon Henry, 1851-1944 · Ithaca, N.Y. Comstock publishing company · leaf 23
dry. Fig. 22. Section of a dry objective showingworking distance and lighting by reflectedlight. Axis. The principal optic axis of the ob-jective. B C. Back Combination, composed of aplano-concave lens of flint glass {F), and adouble convex lens of crown glass (c).F C. Front Combination.C, O, si.… … CH. /] MICROSCOPE AND ACCESSORIES II W. The Working Distance, that is the distance from the front of the objectiveto the object when the objective is in focus. \ iS. Immersion Objectives.—An immersion objective is one with whichthere is some liquid placed between the front of the objective and the…
Microscopy
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