Excerpt from The Elements of Descriptive Geometry, Shadows and Perspective: With a Brief Treatment of Trihedrals, Transversals, and Spherical, Axonometric, and Oblique Projections for Colleges and Scientific Schools This volume, entirely new, and not abridged from my larger ones, was prepared partly to meet an evident demand for brief text-books; however desirable it is that its subjects Should be pursued in collegiate and professional scientific courses as fully as treated in those volumes. 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.