A History Of The Determination Of The Figure Of The Earth From Arc Measurements Classic Reprint

Excerpt from A History of the Determination of the Figure of the Earth From Arc Measurements In observing the angles, of the triangles, a quadrant of a circle, made of copper and about two feet in radius, was used; this was graduated to two minutes, and in reading, estimated to single minutes. The astronomical observations were made with a like quadrant, but of 5 foot radius. Cassini, in 1607, (24, 1718, p. Observed the latitude at several of Snell's stations and was led to believe that the results given were small, and that there were small errors in both the triangulation and latitude observations. Re-observations of latitude and recalculations, by Muschen broek, in 1729, gave as the value of 1 degree, toises. 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.