Excerpt from An Elementary System of Physiology: Comprising a Complete View of the Present State of the Science, Including an Account of All the Most Important Facts and Observations, and Analyses of the Principal Theories and Hypotheses IN presenting to the public a third edition of my System of Physiology, I shall beg to state, that I have endeavoured to render it worthy of their patronage, by inserting into it an account of the numerous additions which the science has recently experienced. This I have done in as brief a manner as was consistent with the object of the work, and in order that it might not be unnecessarily extended, I have omitted some parts and re-modelled others, in conformity with the present state of our information on the various topics which it embraces. I may farther remark, that I have, in most cases. 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.