Download or read book Object Lessons written by George Ricks and published by Forgotten Books. This book was released on 2017-12-03 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Object Lessons: And How to Give Them; Second Series for Intermediate and Grammar Schools There is, however, another source of knowledge of material bodies. In this case the mental impressions are derived from within the body, and are due to muscular exertion. It is by muscular feeling that we estimate the amount of force required to overcome resistance. Thus we get ideas of elasticity and weight from the amount of active energy put forth by the muscles to overcome inertia in the one case and gravitation in the other. If a weight is placed in the hand we are con scious of a certain amount of force expended to keep it from falling; if the weight is increased we are conscious of an increased expenditure of muscular energy. The mental impressions, formed by and through the senses, including muscular feeling, are called sensations. 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.