Excerpt from A Journal of Natural Philosophy, Chemistry and the Arts, 1801, Vol. 4 As this machine is to be moved by the force of men or children, and as.their force varies not only with the ('trength and weight of each individual, but alfo according to the Mt manner in which that (trength or weight is applied, it is, in the (irft place, requifite to eitablifit one determinate mode of applying human force to the machine; and alfo a me thod of determining the relative force of each individual whofe (trength is applied to it. 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.