Excerpt from The Sidereal Messenger, or Monthly Review of Astronomy, Vol. 3: February, 1884 First, then, by a careful discussion, all the observed right ascensions and declinations should be reduced (as far as possible) to some point which is thought to be the centre of gravity. If this point can be found, and the observa tions referred to it, its motion ought to satisfy elliptical ele ments very well, since the disturbing forces are apparently slight. 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.