Hutton, Frederick Remsen, 1853- [from old catalog] · New York, J. Wiley & sons; [etc., etc.] · leaf 123
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… … Fig. 68. proportion less only the volume filled by the tenuous vaporwhich even cool water gives off in a vacuum. It will only benecessary to draw off the condensed steam by proper appa-ratus to enable the vacuum to be maintained which the con-densation has created. The earliest historic…
Mechanical engineering · Steam power plants
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