Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 556
x^^^ … H- ffh\»^^^/i Fig. 219 expressed decimally, and divide by the number of ordinates.The quotient will be the average height of the diagram, andas the scale expresses the number of pounds pressure foreach inch, or fraction of an inch in height, if the qverageheight of the diagram be multiplied by the…
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