Excerpt from Salmon Runs Upper Columbia River, 1956-57 The rate of travel of blueback salmon between Rock Island Dam and Zosel Dam established from tagging experiments was found to be days for the 145 miles distance or miles per day. The difference in time between peaks of abundance at Rock Island and Zosel Dalm also indicated that about lo'hys were required for fish to travel between the two points. 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.