Excerpt from Labor Requirements in Thinning Douglas-Fir and Western Hemlock on Two Experimental Forests in Western Washington The Pacific Northwest Forest and Range Experiment Station has been engaged in research over the past 20 years to discover some of the silvicultural and economic factors which would influence thinning practice. We have accumulated a series of time and production records from several studies of thinning methods. 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.