The microscope; an introduction to microscopic methods and to histology (1917)
Gage, Simon Henry, 1851-1944 · [Ithaca, N.Y.] The Comstock Pub. Co. · leaf 296
e ray of light is bent toward the normal, and on leavingit for a rarer medium, it is bent from the normal (§ 446.) § 457. Principal features of spherical lenses — (1) Principalaxis. This is the straight line passing through the lens and joiningthe centers of the two spheres contributing to the… … Fig. 167. Spherical Lenses with their Forms and Principal Features. (1) Double convex lens showing the two spheres from which it was derived.c-c the centers of the two spheres with the principal axis of the lens on the linejoining the centers. (2) Double concave lens and the two spheres from which…
Microscopy · Microscopy -- Technique
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