Excerpt from Domestic Economy in Theory and Practice: A d104-Book for Teachers and Students in Training Now the great central group of facts which make these rea sons valid is that group which belongs to the Physiology of Man and there can be no doubt that all teachers of Domestic Economy Should be students of Physiology, since it is that science which studies and endeavours to explain the physical phenomena of life. But no student of physiology is properly equipped for his study without at least a rudimentary know ledge of chemistry and physics. For these sciences deal with the properties and behaviour of the substances which make up the material universe, and of these substances living substance is one, although the most complex, the least stable, the hardest to examine; and its relations with other substances, and with its own constituents, are determined by physical laws. 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.