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Excerpt from A Manual of the Protracting Trigonometer, With Its Application to Rectilinear Draughting and Plotting, Trigonometry, and Surveying From the time of Galileo to the present, perfected instruments for accurately measuring angles and distances, have been among the great desiderata of science. And by aid of the improvements furnished through the present achievements of art, the accuracy of those instruments with which the angles and distances are Obtained, that supply the mathematician with the necessary data for his laborious investigations, is truly surprising. 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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