Excerpt from Journal of the Association of Engineering Societies, Vol. 9: Boston, St. Louis, Chicago, Cleveland, Minneapolis, St. Paul, Kansas City, Helena; Transactions of the Boston Society of Civil Engineers, the Engineers' Club of St. Louis, the Western Society of Engineers; January, 1890, to December, 1890 Twill give a brief description of the gates, their location, etc., of the overfall and the weir used to measure the flow also an account Of the method of conducting the experiments and some of the results obtained. Reservoir N O. 4 was formed by the construction of Dam 4 across the valley of Cold Spring Brook. When the surface Of the water in the reservoir is at: high-water mark, the water in front Of the gate house is about 48 feet deep. The waste Of water from the reservoir is controlled by two iron gates. The bottom of the Opening of the lower gate is about 48 feet below high water, and of the upper gate about 25 feet. The water is conducted to the wells in front Of the gates through 48-inch pipes, laid without any fall. The pipe leading to well in front Of upper gate is 45 feet long, and Of lower gate, 848 feet. The Opening in the masonry for each gate is feet wide, feet high and 4 feet long. The iron gates and frames are at the upstream end of the masonry openings. The open ing in the upper gate frame is feet wide and feet high, and in the lower, feet wide and feet high. The gates are of a pattern similar to all the gates in use at the various gate houses of the Boston water-works, and have brass facings where the surfaces of the gate and frame press against each other. 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.