Excerpt from History and Root of the Principle of the Conservation of Energy I In the title of this translation, Arbez't is translated by Energy, as this word conveys a better idea, at the present time, than the older and more literal equivalent of Work. In the text, on the other hand, the word Work will always be used, as it corresponds more closely to the terminology of science at the time of the first publication of this essay. 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.