Book excerpt: Excerpt from The Thresher's Guide, Vol. 1: Being a Reprint From the Thresher's School of Modern Methods of the American Thresherman Atmospheric pressure; principles of action of pumps; principles of the ih jector; of the jet pump. Principles of the steam gauge; single Bourdon spring; double Spring; diaphragm spring. Care of the gauge, the syphon. The fusible plug; principles of action of pop valves. 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.