PROGRESSIVE LESSONS IN APPLIED SCIENCE, VOL. 3

Trigonometry, Vision, Surveying InstrumentsIf, as is usual and convenient, we take the radius of the circle as unit, the semicircumference is 3 141 5926, and therefore the length of an arc of one ancient degree is the 180th part of this or °017 4533, and that of one minute 000 2909. Or if we use the modern division of the circumference into 400 grades, one grade is 015 7080 and one minute (the hundredth part of a grade) is °000 1571. Thus it is an easy matter to make a table of the lengths of circular arcs.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.