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Excerpt from Methods for the Computation of Triangulation on the Grid System Suppose the instrument has been set up at a known-point, and a set of readings has been taken on several other points, both known and unknown. The Y-azimuth from the instrument to each of the other known points may be computed, by means of Equation 1. From any one of these Y-azimuths the Y-azimuth to one of the unknown observed points may be determined by means of the angle observed between the known point and the unknown point. It is, however, more convenient to compute first the Y-azimuth of the imaginary direction which would have been [sighted if the instrument had read zero, -that is, the Y-azimuth of Z ro. Or V-zero. Then the Y-azimuth of any desired direction, on which the reading of the instrument was R, is obtained, if the instrument used is graduated clockwise, by adding R to V-zero. 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.

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