Excerpt from Hydraulic Research in the United States and Canada, 1976 This publication first appeared in 1933 as Hydraulic Research in the United States in answer to a need to keep hydrauliciens aware of pertinent current activity in research laboratories throughout the United States and Canada. With the exception of a few World war II years, it was published annually through 1966, after which publication became biennial In 1972 the title was changed to Hydraulic Research in the United States and Canada. The National Bureau of Standards appreciates the cooperation of the more than 200 organizations which have contributed to this issue their summaries of hydraulic and hydrologic research and of other fluid mechanics research of interest and usefulness to hydrauliciens. These reporting organizations are listed beginning on page vii. Although efforts are made to solicit reports from all laboratories whose work comes to our attention, the National Bureau of Standards cannot assume responsibility for the completeness of this publication. We must depend in the last analysis upon reporting laboratories for the completeness of the coverage of their Own programs, and upon new laboratories engaged in pertinent research to bring their activities to our attention. 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.