File:Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct - for the use of schools and colleges (1870) (14802538793).jpg

Identifier: outlinesofcompar00agas (find matches)
Title: Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges
Year: 1870 (1870s)
Authors: Agassiz, Louis, 1807-1873 Gould, Augustus A. (Augustus Addison), 1805-1866 Wright, Thomas, 1809-1884
Subjects: Physiology, Comparative Zoology
Publisher: London : Bell & Daldy
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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OF SIGHT. 67 by the eyes, I, in the accompanying diagram (fig. 43), falls uponthe two terminal points of the two eyes axes, a and I. Thepoints in the two eyes, A and B, which correspond or aresimilarly situated, with reference to all surrounding points m
Text Appearing After Image:
are entitled IDENTICAL, inasmuch as they comport themselvessubjectively as if they were in reality but a single point, andimages impressed upon them excite in the mind the idea ofbut one image. Besides these, there are other points of theretina which are also identical or correspondent; in otherwords, which present single mental conceptions of doubleretinal impressions ; but it is a law that the objects and cor-responding points of the retina rnnst lie in a certain circle, SPECIAL SENSES. which is designated the HOEOPTER,—a circle (fig. 43) whichpasses at once through the point of coincidence, /, of the visualaxes, I a, I b, and the points of decussation, c c\ of these axeswith the lines of direction.)* § 135. The eye constructed as above described, is called asimple eye, and belongs more especially to the vertebrate ani-mals. In man, it arrives at its highest perfection. In him,the eye also performs a more exalted office than mere vision.It is a mirror in which the inner man is re

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