Excerpt from A Biennial Retrospect of Medicine, Surgery, and Their Allied Sciences for 1867-8 Experiments upon the gases of the blood have been conducted by Ludwig and Schmidt,1 who corroborate the view generally entertained, that the carbonic acid of the blood is in part derived from the disintegration of the muscular tissue, the quantity being always greater in blood returning from muscles in action than from those at rest. Though it is probable that much of the carbonic acid of the blood is contained in solution in the liquor sanguinis, combined with the alkalies as a bicarbonate, and in union with the phosphate of soda, yet it appears from other experiments of Schmidt§ that this gas is to a certain though small extent combined with the constituents of the blood-corpuscles. Brucke maintains with Richardson that blood at ordinary temperature exhales a little ammonia. The latter author, however, has withdrawn his statement to the effect that the coagulation of the blood is dependent on the exhalation of the ammonia it contains. 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.