Ripper, William, 1853-1937 · London, New York [etc.] : Longmans, Green and co. · leaf 125
e forward - pressure lineremains. In all cases of diagrams with loops, it is advisable to drawthe zero line of pressure, and estimate by the usual method ofordinates, the mean pressure of the whole forward-pressure diagram,cibcde (Fig. 124), and afterwards of the back-pressure diagram,ahfgde, shown… … Fig. 12G. Avith the two ends of the cylinder by pipes and a three-way cock,as shown in Fig. 125, the two diagrams may both be taken on onecard, as Fig. 126. This system (Fig. 125) is not to be i-ecommendedexcept for small engines. The mean pressure of such diagrams istaken by measurement…
Steam-engines
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