Excerpt from Zone Catalogue of 20, 843 Stars Included Between 40 Degrees and 52 Degrees of South Declination, Referred to the Equinox, 1900: Derived From Meridian Observations and Photographs Made at the Royal Observatory, Cape of Good Hope On each Sub-zone the plates are arranged at such intervals in ra. As to ensure that no portion of the area involved is excluded. AS each plate covers an area of 2 Degrees square, every part of the region except those lying between the extreme degrees - 40 Degrees to - 41 Degrees and - 51 Degrees to - 52 Degrees will thus appear on two plates at least. Between the limits of declination - 41 Degrees to each zone consists of 144 plates, t.e., the centres of consecutive plates are located at intervals of 10 minutes in ra. Those on the even degrees are centred at 01] 0h oh etc., while those on the odd degrees have their centres at 0h 0h etc. Thus there are seven consecutive zones covered by pairs of plates which overlap approximately by quadrants, while in addition there are small marginal strips common to consecutive plates taken on the same degree of declination. 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.