The microscope; an introduction to microscopic methods and to histology (1899)
Gage, Simon Henry, 1851-1944 · Ithaca, N. Y., Comstock publishing company · leaf 23
ervation, the eye of the observer forms anintegral part of the optical combination (Figs. 16, 21). \ 2. A Simple Microscope.—With this an enlarged, erect image of an objectmay be seen. It always consists of one or more converging lenses or lens-systems(Figs. 16-20), and the object must be placed…
Microscopy -- Technique
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