Excerpt from The Effect of Severe and Prolonged Muscular Work on Food Consumption, Digestion, and Metabolism, And, the Mechanical Work and Efficiency of Bicyclers Lawes and Gilbert. In 1854 3 showed that with animals under uniform conditions as regards exercise the amount of excreted nitrogen de pends upon the amount ingested while C. Voit* a few years later demonstrated that under some conditions at least an animal with a uniform ingestion of protein may perform an increased amount of muscular work without increasing the excretion of urea. Lehmann held that the excretion of nitrogen was dependent mainly upon the diet, but that when the latter was uniform the elimination of urea was increased by muscular exercise. 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.