Excerpt from d104-Book of Mechanics, Vol. 5 Mechanics may conveniently be divided into three parts: mechanics of solids, Of liquids, and of gases. Mechan ics of solids, when ideal, rigid solids only are considered, forms the simplest part of the subject, and this is the part first studied under the title of theoretical mechanics. When rigidity is no longer assumed the study of the mechanics of solids involves the elastic properties of materials. The rational, rigorously developed theory of elasticity is so complicated and leads to results SO unsatisfactory from the practical standpoint that engineering students are (and all students should be) first taught a simplified theory of elasticity known as mechanics of materials where, whenever the rigorous theory leads too far afield, recourse is had to approximations and reasonable assumptions based upon observation and experiment. The study of the mechanics of liquids is divided into hydrostatics and hydrokinetics. In the first division are studied the effects of liquids at rest; in the second liquids in motion. 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.