hen the violet is focused the slowness or the haste of the accommodation in its That the different colors of the spectrum may be re- upon the screen, the violet objects are sharply de- fined without any marginal extension, but if at this endeavor to put the eye in focus at every instant. It united… … Fig. 3. Fig. 4. colors of the spectrum without the use of any other appear violet at the center and as if surrounded by a of rotation of the disk is adapted to a given eye and optical apparatus than the eye itself and its faculty red aureola. In Fig. 1 the surfaces marked r are the synchronous with…
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