Excerpt from Partial Report Upon the Comprehensive Plan for the Collection, Purification and Disposal of the Sewage of the Entire City: Report of the Bureau of Surveys Comprising the Work at the Sewage Experiment Station at Spring Garden, Philadelphia, 1910For the purpose of comparison, the results of sedimenta tion are given in percentage removal, although it is recognized that effluents which are produced with equal percentage removal are not comparable on the basis of solids content.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.