Excerpt from On the Measurement of Water by a Small Venturi Meter This form of meter is especially applicable to water-mains, as the head necessary to Operate the meter is small and the quan tities may be extremely large. Herschel (1) has shown that, in meters applicable to mains of 1 foot and 9 feet diameter respectively, the flow is proportional to the square root of the difference of head between the two sections of the cone forming the essential part of the meter, and this holds through the whole range. 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.