Excerpt from Report on Current-Meter Observations in the Mississippi River, Near Burlington, Iowa, During the Month of October, 1879: Illustrated by One Sketch and Forty-One PlatesSix meters were used for these current observations, and were usually set on the wire cable equidistant from each other, and at the same distance from the bottom and surface of the river, for instance, in 21 feet depth of water the upper meter would be 3 feet below the surface, and with 3 feet between the meters, the lower one would be 3 feet above the bottom.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.