Excerpt from A Textbook on Mechanical and Electrical Engineering, Vol. 2: Steam and Steam Engines; Strength of Materials; Applied Mechanics; Steam Boilers; With Practical Questions and Examples Now, raise the piston, keeping the temperature at With a perfect gas, we know that the pressure would fall in exact proportion to the increase in volume; the steam, how ever, behaves in a different manner. Part of the water changes to steam as the piston rises, but there is no change in the pressure. If the pressure on the piston is increased, it is found that the temperature of the water must be increased before steam is formed; thus, make the pressure 30 pounds per square inch, and we find that no steam is formed until the tempera ture reaches At this temperature, it is also found that no change in the volume of the steam affects its pressure. 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.