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Excerpt from Bulletin of the Chicago Academy of Sciences, Vol. 4: May, 1913 There are a few ring nebulae in the heavens. The one best known is that in the constellation Lyra. The origin of these is beyond conjecture. In addition to the spiral and ring nebulae there are a number of nebulous bodies which are very irregular but extremely beauti ful. The most beautiful object 'in the heavens when seen with a telescope is the great nebula Orion. Large transparencies made from photographs of several of the nebulae are on exhibition in the Academy Museum. 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.

Includes the proceedings.

Issues for 1977-1979 include also Special List journals being indexed in cooperation with other institutions. Citations from these journals appear in other MEDLARS bibliographies and in MEDLING, but not in Index medicus.