Excerpt from Elements of Physics, Vol. 1 of 2: Or Natural Philosophy, General and Medical, Explained Independently of Technical Mathematics, and Containing New Disquisitions and Practical Suggestions Astronomy, which is the instance chosen above, is only one of innumerable subjects, which, when imperfectly understood, appear obscure and difficult, but when more fully investigated, become simplicity itself. As an exam ple from the studies of medical men may be mentioned the question of the movement of the blood in the veins, which has lately been discussed in medical societies and reviews with considerable earnestness. In this question, the appeal is necessarily made to the laws of Natural Philosophy, which govern the phenomenon; but because the study of these has been little cultivated by the facul ty, more time has been absorbed in futile disputation and experiment than would have sufficed for acquiring a competent knowledge of the whole body of Physics now the single section of Physics, which bears on the point if understood in a moderate degree, would have caused all the difficulties at once to vanish. The circu lation of the blood, again, is but one of numerous and scarcely less important subjects in the medical art to which Natural Philosophy is the easy and only key. 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.