Excerpt from An Elementary Treatise on Descriptive Geometry, With a Theory of Shadows and of Perspective: Extracted From the French of G. Monge; To Which Is Added, a Description of the Principles and Practice of Isometrical Projection; The Whole Being Intended as an Introduction to the Application of Descriptive Geometry to Various Branches of the Arts On the tangent plane to a cylindrical surface, a conical surface, and to a surface of revolution, drawn through points without the surfaces (pl. V. VI., fig. 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.