Excerpt from A Course in Descriptive Geometry and Photogrammetry for the Mathematical Laboratory This operation of turning a plane into coincidence with another plane is of frequent application in the processes of descriptive geometry, and is known under the name of ra batting.* Several illustrations of the power and scope of this method will be seen in the next chapter. 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.