Excerpt from Compressed Air Magazine, Vol. 14: January to December, 1909, Inclusive In considering the question of pressures it should be remembered that the pressures named are those that should be obtained at the sand blast, which can be confirmed by attaching a pressure gage to the sand tank, and that if the air has to be led to any distance from the air compressor and receiver, the de livery pipe should be materially increased to allow for friction, otherwise the pressure will fall off and the action of the sand blast will not be up to requirements. With but little foresight and at a very little additional expense, air delivery pipes of ample diameter can be installed up to the sand blast, giving the benefit of the full pressure as well as that of a considerable body of air behind the sand jets. The article above quoted then speaks of the trouble which may be caused by moisture in the air, If the air pipe is long, it says, con densation may take place within it, which if allowed to enter the sand tank would moisten the sand, and care should be taken to remove this either by trapping or by arranging in the piping a U bend, from the bottom of which any condensed water may be drawn off, and by suitably jacketing the main line. It is the function of the air receiver to dry the air. If the air in the receiver is at its high est pressure and at its lowest temperature the moisture will be deposited there and no mois ture will make its presence known. With the receiver located near the compressor, as is customary, the air is not cool enough, but with a long pipe to traverse, not jacketed, and a receiver near the work the air should always be dry enough. 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.