Text-Book on Solid Jr. Or Descriptive Geometry, Vol. 1 of 2 (Classic Reprint)

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Excerpt from Text-Book on Solid Jr. Or Descriptive Geometry, Vol. 1 of 2Projection. The problems of Descriptive Geometry are best solved by means of the method of projections which we shall now consider.When an Object is seen by the eye of an individual, rays of light come from all the visible points Of that Object, and converge towards a point within the eye. Now suppose that a ¿at piece of glass is placed between the Object and the eye of the spectator, and that each ray of light, in passing through the glass from the object to the eye leaves a mark on its surface of the same colour and tint as the part of the object from which the ray came, a picture would be produced on the surface of the glass, and if the Object were now removed.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.