Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 101
capable of individualdetermination, since the capacity for appreciating light varies withdifferent individuals. If, for instance, we take •43/ti in the solar spectrum as beingsufficiently luminous for vision, we find the maximum—so far asseeing is concerned—to be 118,000 to the inch (the object, in… … Fig. 66. This important subject can scarcely be considered complete, evenin outline, without a brief consideration, in their combined relations,of apertures in excess of 180° in air and the special function theseapertures possess. 1. Suppose any object composed of minute elements in…
Microscopy
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