Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 37
rays will not beparallel. This explains how it is that when rays parallel to the axis fallon the prism (see fig. 8) those which pass through the prisms neartheir bases cut the axis nearer the prisms than those which passthrough near the apex. But in a convex lens the reverse takes place ; the rays… … Fi<;. 10.—Front and edge views of a biconvex lens.(From the Forces of Nature.) both in perspective, as seen from the edge, and with a full view ofthe disc ; while the various forms which for various optical purposes,are given to lenses is shown in figs. 11 and 12. Now, if we study the four…
Microscopy
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