Exposição Conjuncta De Mappas Militares E an Arte De Fazer Mappas Preparada Pelo Ministerio Da Guerra E O Ministerio Do Interior Estados Unidos De America

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Excerpt from Exposição Conjuncta De Mappas Militares E an Arte De Fazer Mappas Preparada Pelo Ministerio Da Guerra E O Ministerio Do Interior Estados Unidos De America: Joint Exhibit of Military Maps and Mapping Prepared by the War Department and the Department of the Interior, United States of AmericaAS shown in Plate I, the plane table consists of a drawing board supported by a tripod. The board can be leveled and also turned in any horizontal posi tion and can be clamped when properly set. When in use the table and its Support must never move, and the greatest care must be taken that when it is once set or oriented it shall not be disturbed in position. The engineer must neither lean on it nor against it. On the board is fastened the drawing paper upon which the map is to be plotted. The paper used is thick and double mounted - that is, so mounted on both sides of a sheet of linen cloth that the grain of the paper runs at right angles on its two faces. Such paper is well seasoned for several years, and then either side may be used. Plane-table boards are usually 18 by 24 inches in size, but both larger and smaller boards are In use.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.