Lanterna Rally

Author: Henry F. Armstrong

Publisher: Forgotten Books

Published: 2015-06-26

Total Pages: 135

ISBN-13: 9781330421109

Excerpt from Descriptive Geometry for Students in Engineering Science and Architecture: A Carefully Graded Course of Instruction Section 1. In Descriptive Geometry the object is chiefly to prepare drawings as follows: - (а) Those which will display or describe by different views any object or arrangement oi lines or figures discussed; (b) Those which will, by various analytical and constructive methods and operations, discover or disclose facts as to shapes, inclinations, appearances, sizes, etc.; and (c) Those which will represent planes and how they may be disposed to one another. The views mentioned above in (a) are projections, and are made on what arc called planes of projection. The same projection planes, two in number, are also made use of in the discussion of planes referred to in (c), lines being drawn over the planes of projection and made to represent other planes in various attitudes with respect to the projection planes. The planes of projection are the Horizontal Plane and the Vertical Plane. These arc considered as being fixed, and the lines, planes, figures or objects are considered as having a relation to them - near or otherwise as to distance, inclined or otherwise as to altitude. The drawings made either represent points, lines, figures or objects by views thrown perpendicularly on to these planes of projection (the H.P. and the V.P. as they are commonly called), or they indicate the intersection of the planes of projection by lines and planes. 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.