Excerpt from Human Physiology: A Text-Book for High Schools and Colleges Those who are pursuing researches in the chemistry of living things are more and more definitely separated from those whose studies are physical. It is scarcely possible to be an authority in both subdivisions. Specialization constantly becomes more pronounced. For example, the subject of the electric phenomena which can be observed in living tissues is extensive enough by itself to engage the exclusive attention of many students. Methods in Physiology. - Somet_hing must now be said of the methods which physiologists employ. Evidently they must work upon living matter since their interest is in the reactions which are peculiar to it. It does not follow that they always make use of intact organisms for the living state may often be protracted for some time in portions of animals (or plants) detached from the body. Thus the muscles of a frog's leg can be preserved for hours after separation from the other systems and will behave in much the same way as if they were still united with them. This property of survival, which is so valuable to experimenters, is much more to be relied on in the so-called cold - blooded than in the warm-blooded animals. 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.