32 MICROSCOPE AND ACCESSORIES CH. I] … by getting the object in the center of the field with a low objectivebefore putting the high objective in position. This is greatly facili-tated by using a nose-piece, or revolver. (See Fig. 40 and thepictures of microscopes, Ch. II.) Fig. 41. Krauss Method ofMarking Objectives on a Re-volving…
Microscopy
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