Excerpt from Structure Shielding Against Fallout Gamma Rays From Nuclear Detonations Attempts to develop satisfactory methods for estimating the shielding properties of ordinary buildings against gamma rays from radioactive fallout began in the early 1950's. Intensive research of many kinds was carried out during the decade from about 1956 to 1966; but in the past decade, there has been a steady decline of new research on these problems. There are many reasons for this, one of which is not, however, the achievement of a fully satisfactory state of the technology. An updating and improvement of the material presented here is overdue, but is not easily effected. We intend this publication to serve 1) as a reference for engineering students, 2) as a reference and source of ideas for engineers engaged in research and development on radiation shielding problems, 3) as a basic reference by architects and engineers concerned with the design of buildings with protective features, and 4) a reference for officials responsible for civil protection in nuclear emergencies. These multiple uses are expected partly because this is the first attempt to bring together and summarize much of the material presented. 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.