Excerpt from Vapor Pressure of Ammonia The accuracy of any vapor-pressure measurements is determined, in general, by four factors; namely, (a) purity of the material, (6) certainty, pf feqmlibrium; conditions, (c) precision of the pressure-measuring instrument, and temperature measurement and control. 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.