Excerpt from The Physiology of the Circulation in Plants in the Lower Animals, and in Man: Being a Course of Lectures Delivered at Surgeons' Hall to the President, Fellows, Etc, of the Royal College of Surgeons of Edinburgh, in the Summer of 1872 In the present volume I have endeavoured to give ax comprehensive account of the Circulation and the apparatus by which it is effected in Plants, in the Lower Animals, and in Man. I have discussed the subject in its totality, in the hope that those parts of the circulation which appeared obscure in the higher animals might be simplified by comparing them with similar parts in the lower animals and in plants. This mode of treatment involves details, but these, I trust, will be found also to add additional interest. I have introduced a large number of drawings in place of the diagrams originally employed in illustrating the Course, in order to efface in some measure the traces of lecturing. I have not, however, found time to recast or alter the Lectures in any way, so that, with the exception of a few verbal corrections, they appear in their original form. This circumstance will not, I trust, detract from their usefulness. My best. thanks are due to my friend Mr. Archibald Constable for having relieved me of the labour of reading the proofs for press. 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.