Transactions Of The Twenty Ninth Annual Meeting Of The Society

Author : American Microscopical Society
Publisher : Forgotten Books
ISBN 13 : 9781334468964
Total Pages : 666 pages
Book Rating : 4.4/5 (689 download)

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Download or read book Transactions of the American Microscopical Society, Vol. 22 written by American Microscopical Society and published by Forgotten Books. This book was released on 2016-11-30 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Transactions of the American Microscopical Society, Vol. 22: Organized 1878, Incorporated 1891; Twenty-Third Annual Meeting Held in New York City, June 28, 29, and 30, 1900 Scrutiny for their recognition. That the danger of fallacious finding is a real and not infrequent one is apparent from a perusal of the literature on the subject, in which are given many instances of such mistakes; and one having even a limited experience in this line will be sure to have encoun tered such bodies in one or two instances. In fact, Richard son, referring to the various uids recommended for the ex traction of corpuscles from old stains, and speaking of one of them - na2s04 - says, It must, I think, owe its popularity chie y to the fact that it contains large quantities of fungus, the spores of which resemble blood corpuscles both in size and appearance and have, I have no doubt, frequently been mistaken for blood-cells. A very careful study of the chemi cal composition of blood-cells shows that there are slight dif ferences in the amounts of alkalies, phosphates, hemoglobin in difierent animals, but the amount of blood necessary for such determinations is so large as to preclude use of the facts for the purposes before us. Since, then, the answer to be obtained from a study of the corpuscles as such is limited, their available constituent, the hemoglobin, a crystallizable body, has been called upon with the hope of getting from it something definite or trustworthy. This interesting body, also known as the blood-pigment or blood-coloring matter, may therefore be considered in some of its properties, even at the risk of repeating what is everyday knowledge. Hemoglobin occurs in the red cells and belongs chemically to the proteid group, and can be obtained more or less readily in crystals. It is a very unstable body, readily undergoing change and decomposition by agencies inert to other physio logical constituents; in fact, it owes its physiological value in the organism to the ease with which it may be changed. Heat, weak acids or alkalies will split it up into an albumen - globu lin - and an iron containing colored organic body, the hematin, and this change will even take place in dried blood when long exposed to the air. It is well known that the form of the crys tals and the ease with which they may be obtained will differ with the species of the animal from which the blood has come. Accordingly Guelfi made this a basis for some work bearing on the question of the recognition. A 2% nafl. Solution is used with an equal quantity of blood and held at a tempera ture of when crystallization will soon take place. Thus there are procured from guinea pig blood tetra-hedra; from. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works."