Author Description

Excerpt from Elements of Descriptive Geometry: With Applications to Isometrical Drawing and Cavalier Projection Having been convinced, by a class-room experience of many years at the Stevens Institute of Technology, of the desirability of a text-book on Descriptive Geometry different in some respects from any previously existing, I have endeavored to produce a work suitable for use in colleges and scientific schools, and also by those who may wish to acquire some knowledge of the subject without the aid of an instructor. In the course of that experience many points have arisen, leading to original work embodied in this treatise; in the preparation of which, however, much benefit has been derived from reference to the works of Olivier, Julien, Church, Warren, Watson, and others. The study of Descriptive Geometry is not usually begun, nor should it ever be, until some familiarity with the ordinary operations of Mechanical Drawing has been attained. But when the former is taken up its identity with the latter should never he lost sight of, as it too often is: for this reason a departure has been made from the stereotyped methods of treatment, which in fact tend rather to conceal than to exhibit that identity. At the outset considerable difficulty is often experienced in forming clear conceptions of the relations between abstract things, such as lines and planes, by the aid of orthographic projections only. The power of doing so is of course essential; and it is believed that the pictorial representations which have been introduced will be of assistance in acquiring 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. I