. A text-book of comparative physiology [microform] : for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. 640 COMPARATIVE PHYSIOLOGY. effected in the retina aa aenaory impre$8ioM or impulw^ which, when compkted by oonresponding change* in the bi»in, develop into muattons, which ai« reprewmted psychically hjper^ tiotu; hence, though aU these have a natund connection, they may for tiie moment be conridenjd wparately. It m as yet beyond our power to explain how they are wdated to each o
. A text-book of comparative physiology [microform] : for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. 640 COMPARATIVE PHYSIOLOGY. effected in the retina aa aenaory impre$8ioM or impulw^ which, when compkted by oonresponding change* in the bi»in, develop into muattons, which ai« reprewmted psychically hjper^ tiotu; hence, though aU these have a natund connection, they may for tiie moment be conridenjd wparately. It m as yet beyond our power to explain how they are wdated to each otiier except in the most general way, and the manner in which a mental peroeption grows out of a physical alteration m the molecules of the brain is at present entirely beyond human comprehension. . x ^i. * *i. «i»— /»# f^ff^mm of th* BfltiBft.—There is no doubt that the flben ol the optic nerves can not of tliemselves be directly affected by liffht This may be experimentally demonstrated to one s self S a variety of methods, of which the following is readily ca^ ried out: Look at the oirele (Fig. 8») on the left hand with the. right eye, the left being dosed, and, with the page •bout twel^« t«r flftwn inches distant, gradually approximate it to tte ^e. when suddenly the cross will disappear, its image at that di^. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Mills, Wesley, 1847-1915. New York : D. Appleton; London : Caxton House
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