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Excerpt from The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Vol. 20: Fifth Series; July-December 1885 <p>In both J oule's and Weber's experiments a possible source of error seems to have been ignored. The wire was assumed to be at the temperature of the water in which it was immersed, and its resistance was calculated on this assumption. It is evident, however, that the wire was hotter than the water, inasmuch as it was giving heat to the water. The error due to this cause is of uncertain amount. If corrected for this error, the values of the equivalent would be increased and their excess over the water-friction values would become greater than before. To avoid this source of error, the research described below was planned. The suggestion and general plan of the research I owe to Professor Rowland. <p>About the Publisher <p>Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com <p>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.