Excerpt from Transactions of the American Society of Civil Engineers, Vol. 40: Instituted 1852 To the second question, only twenty-three of the eighty ventured an Opinion. Of these, eight thought that the grade did not affect the question, but that flush-tanks were as necessary on steep as on flat grades. One engineer explained his position by saying that while the velocity on the steep grades might be greater, yet as the depth would be less, the transporting power would be less, and therefore tanks were equally necessary. Of the fifteen who thought that tanks are not needed above a certain grade, six merelv ventured it as an Opinion, and nine fixed the limit at from to 3 per cent. Four give 1% as the limit; one, and the other four give less than 1 per cent. Only six replies were given to the last question, whether the amount of water in the flush-tank should be varied. With the grade of the sewer. Of these, two thought that no difference should be made; three thought that less water could be used on the steeper grades, but had no definite Opinion as to the relative amounts; while one well known engineer, who has thoroughly studied the workings of the sewer system under his care, writes that he finds one flush daily on a 2 grade as effective as two flushes daily on a grade, each flush Of 300 galls. 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.