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Excerpt from Measurements of the Fall-Velocities of Water-Drops and Raindrops This paper presents measurements of the velocities of water drops of sizes ranging from 1 to 6 mm in diameter, falling in still air from heights of to 20 meters. A few measurements of rain drop velocities are also reported. These measurements were undertaken to assist in an under standing of the action of rain, both real and artificial, in eroding soil. The drop sizes of rains have also been measured and will be reported separately. All of these studies were carried out at the Hydraulic Laboratory of the National Bureau of Standards as a part of the work of the Soil Conservation Service. 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.