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Image from page 446 of “Clinical lectures on the principles and practice of medicine” (1874) | Kirkwood Oranges – Find Addo Accommodation.


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Identifier: clinicallectures1874benn
Title: Clinical lectures on the principles and practice of medicine
Year: 1874 (1870s)
Authors: Bennett, John Hughes, 1812-1875
Subjects: Medicine Medicine
Publisher: New York : Wood
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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ultimately converted into black. Not unfrequently crystals, supposed tobe of hematine, are scattered among the broken-up clots, and have beenseen both of a deep-red and black color even within the membrane alludedto. That this membrane really does form in the manner described—that is, secondarily—around heaps of blood corpuscles, I am satisfied—myformer assistant, Dr. Sanderson, having proved it by direct experimentsin my presence. He thrust a needle through the cranium into the cere-bral lobes of four pigeons which were killed, and the brain inspected,successively on the third, fifth, and sixth days. There could be observedin one case, where a slight hemorrhagic streak marked the track of thepin, that the cerebral substance, seen under a magnifying power of 250diameters linear, contained groups of from five to twelve oval blood cor-puscles, each surrounded by a delicate membrane. (See Fig. 317, p. 248.)When the clot is large, this process may go on through its entire sub- a b c

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Fig. 410. stance, in conjunction with the formation of compound granular cells. Iexamined a tumor the size of a small hens egg, brought to me by Dr.Peddie,^ in which the external layer presented numerous fibre cells andfibres, in various stages of development, whilst the interior was prin-cipally composed of numerous granules and compound granular cells.Here and there, however, were patches of red extravasation more or less Fig. 410. Section of the capsule and portion of the coagulum, size of an orange,f und in the brain in Dr. Kirkwoods case. «, External portion of capsule, consistingof fibrinous laminas; b, internal portion of capsule, rendered dark-red, purple, andopaque, from condensed blood corpuscles; c, broken-down blood corpuscles in the in-terior, with crystals of cholesterine. 250 diam. 27 418 DISEASES OF THE NERVOUS SYSTEM. recent, containing large delicate vesicles filled with blood globules. (SeeFig. 316, p. 248.) In another tumor sent me for examination by Dr.Kirkwood o

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