A Catechism of the Steam Engine

Bücher

Angebote / Angebote:

Excerpt from A Catechism of the Steam Engine: Illustrative of the Scientific Principles Upon Which Its Operation Depends, and the Practical Details of Its Structure, in Its Application to Mines, Mills, Steam Navigation and Railways, With Various Suggestions of ImprovementA. - Because it is not the vacuum which exerts this pressure, but the atmosphere, which, like a head of water, presses on every thing immerged beneath it. A head of water, however, would not press down a piston, if the water were admitted on both its sides, for an equilibrium would then be established, just as a balance retains its equilibrium though an equal Weight be added to each scale, but take the weight out of one scale, or empty the water from one side of the piston, and motion or pressure is produced, and in like manner pressure is produced on a piston by admitting steam or air upon the one side, and withdrawing the steam or air from the other side. It is not, therefore, to a vac uum, but rather to the existence of an unbalanced plenum, that the pressure made manifest by exhaustion is due, and every one knows that a vacuum of itself would not work an engine.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.