File:Manual of human histology (1853) (14781242414).jpg

Identifier: manualofhumanhis02kl (find matches)
Title: Manual of human histology
Year: 1853 (1850s)
Authors: Kölliker, Albert, 1817-1905 Busk, George, 1807-1886, ed. and tr Huxley, Thomas Henry, 1825-1895, ed. and tr
Subjects: Histology Histology
Publisher: London : printed for the Sydenham society
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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ts rounded spaces, placed at a greateror less depth, filled with a clear substance,which also occupies elsewhere the inter-stices between the elements of this layer.These clear spaces, corresponding to thecones, present an internal, dark, smallercircle, the terminal surface or apparent transverse section ofthe rod which is seated upon the cone, and are sur-rounded by the closely crowded terminal surfaces of the properrods, disposed in a sort of mosaic manner, their outlines beingindicated by the single, double, or multiple series of reticulations(fig. 304). 2. The granular layer, stratum granulosum (fig. 303 h,f), iscomposed of opaque, granular corpuscles, reflecting the light Fig. 304. Bacilllar layer from without. 1, at the yellow spot (only cones);2, at the border of the same; 3, from the middle of the retina : a, cones, or va-cuities corresponding with them ; h, rods of the cones, whose terminal surfaceis often placed rather more deeply than that of the proper rods, c; x 350 diam.
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THE EYE. 373 tolerably strongly, of a round or oval figure, and 0*002—0-004/ in size, sometimes looking like free nuclei, sometimeslike minute cells almost entirely filled hylwcge nuclei, although,according to my observations, they should all be referred tothe hitter category. For I find, especially in preparationsmade with chromic acid, that from both sides of every granulevery fine filaments, 0*002—0003 thick, are regularly givenoff, which in many cases may be distinctly seen to proceedfrom a pale border surrounding the granule, so that the wholeis very like a bipolar ganglion-cell in miniature. In Man,the granules, in the greater part of the relina, are disposed intwo layers—an outer, thicker, of 0-013—0016 (h), and aninner, thinner (/), of 0-006—0-008—which are parted fromeach other by a clear, fine-granular, and, to some extent,vertically striated layer (g), 0-006—0-008 thick; whilst,towards the ora serrata, the two constitute a single stratum ofnot more than 0015 i

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