Excerpt from Monograph of the Central Parts of the Nebula of Orion: R. A. 5h 28m 24s; O, N. P. D. 952910; 9, 1860; 0 The main Object of this memoir is to leave such measures and descriptions of the brightest parts of the nebula of Orion as shall enable another person Observing in after years with the same telescope, under like conditions, to say with certainty whether or no changes have occurred in these parts of this nebula. The brightest parts are chosen so as to avoid as far as possible any uncertainty in the conclusion then to be reached, and also because there is little to be added to the complete Observations of Lord rosse and of Gr. P. Bond on, the fainter portions. A second and an important Object is to make a thorough discussion of the vast mass of material now on hand. 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.