The Forces of Nature

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Excerpt from The Forces of Nature: An Address Delivered Before the Chemical Society of Union College, July 22d, 1863Let us therefore take a few examples among the best known forces and see in what their peculiar essence consists.Take a rod Of glass, for instance, and rub it with a piece Of silk, and at once there is developed, both in the glass and in the Silk, a peculiar power. By bringing light bodies in the vicinity of either the glass or the silk, they at first ¿y toward it, and are then repelled. Attraction and repulsion, or motion, is then a manifestation of the Force we call Electricity.SO too if we fit an iron ball accurately into a ring, and then place the ball in a fire, we Shall find that when it has become hot, it will no longer pass through the ring. In common language it has expanded. But this expansion is a motion Of particles from the centre toward the circum ference, effected by the Force we call Heat.We might continue this examination and include the other Forces. Light is propelled by rapid undulations Of a tenuous ether. In fact, this very vibration, this motion, is the real essence Of Light.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.