Excerpt from Proceedings of the Engineers' Club of Philadelphia, Vol. 30 Other societies of the same character have been organized in some of the larger cities and are doing effective work along similar lines to that of the London society. One of the most active of these is the Smoke Abatement League of Great Britain which has its headquarters in Manchester and branches in many of the other large industrial centers. 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.