. A text-book of animal physiology [microform] : with introductory chapters on general biology and a full treatment of reproduction, for students of human and comparative (veterinary) medicine and of general biology. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. focused be- i objects cau Uadols). e use of con- ommodation. ttcfcly beyond nally distant odied by the 'e of the old, a diminished diefly, proba- the changes B may be dis- edy is to aid , It is prac- any of these mark applies >medy should may be to a s place in the ; reference to p
. A text-book of animal physiology [microform] : with introductory chapters on general biology and a full treatment of reproduction, for students of human and comparative (veterinary) medicine and of general biology. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. focused be- i objects cau Uadols). e use of con- ommodation. ttcfcly beyond nally distant odied by the 'e of the old, a diminished diefly, proba- the changes B may be dis- edy is to aid , It is prac- any of these mark applies >medy should may be to a s place in the ; reference to perception of is formed on »n of nervous ambling that t to speak of it clear mem- en/* not only VISION. 677 must there be a clear image formed on the retina, but impulses generated in that nerve expansion must be conducted to the brain, and rouse in certain cells there peculiar molecular condi- tions, upon which the perception finally depends. For the sake of clearness, we may speak of the changes effected in the retina as sensory impressions or impulses, which, when completed by corresponding changes in the brain, develop into sensations, which are represented psychically by percep- iions; hence, though all these have a natural connection, they may for the moment be considered separately. It is as yet beyond our power to explain how they are related to each other except in the most general way, and the manner in which a mental perception grows out of a physical alteration in the molecules of the brain is at present entirely beyond human comprehension. â¢â â¢J. â ,^ FW. «â¢. Fio.' Fm: â 419.âVerttoal â Mtfcm of ntiii* (after H. Kflller). 1. lnjrer of rods and oobm ; I, roda; a, eonw; 4,6, e, extoriMl Knnnto Ikrar; 7, intwiMl grwiule lajrer; », 10, fliiely mmular grajr kw«r; 11, lajrar of ncrveHMlls; It, 14, flMn of <Ale Mr««; 18. membntM Irniitena. m-OonnMUon of roda fiid oonea of r«tiiw witfi nerroiia elemenu <*fter S^ppejr). TIm nat
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Keywords: ., bookauthormillswes, bookcentury1800, bookdecade1880, bookyear1889
