Excerpt from Proceedings of the American Association for the Advancement of Science, Fifty-Fourth Meeting: Held at Philadelphia, Pa;, December 27-31, 1904 Social and Economic Science - martin A. Knapp, U. S. Inter state Commerce Commission, Washington, D. C. Physiology and Experimental Medicine - H. P. Bowditch, Har vard University, Cambridge, Mass. 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.