The microscope; an introduction to microscopic methods and to histology (1901)
Gage, Simon Henry, 1851-1944 · Ithaca, N.Y. Comstock publishing company · leaf 20
principal focus. Com-pare (§53). After getting as clear an image as possible with a simple micro-scope, do not change the position of the microscope but move the eyenearer and farther from it, and note that when the eye is in one posi-tion, the largest field may be seen. This position corresponds… … Fig. 17. Tripod Magnifier.
Microscopy
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