The microscope; an introduction to microscopic methods and to histology (1899)
Gage, Simon Henry, 1851-1944 · Ithaca, N. Y., Comstock publishing company · leaf 23
Figs. 1-9, showing the Principal Optic Axis and the Optical Center of variousforms of Lenses. Axis. The Principal Optic Axis, c-c. Centers of curvature of the tzvo surfaces of the lens. c. I. Optical center of the lens,lens surfaces, t-t. Tangents in Fig. 4. r-r. Radii of curvature of the two \ 3.…
Microscopy -- Technique
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