Hutton, Frederick Remsen, 1853-1918 · New York, J. Wiley & sons; London, Chapman & Hall, limited · leaf 137
on the returnstroke, which may be called the back-pressure. The dottedline represents the pressure just above atmosphere, while thefull line diagram shows a pressure of 14.7 lbs, below it. The physical principle on which the condensation of steamcauses the practical vacuum is that one cubic inch of… … Atmospfiene tine Fig. 68. volume in the same proportion less only the volume filled bythe tenuous vapor which even cool water gives off in a vacuum.It will only be necessary to draw off the condensed steam byproper apparatus to enable the vacuum to be maintained whichthe condensation has created.…
Mechanical engineering · Steam power plants
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