Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 551
neering Starting with line E 26, it has been noted that its lengthis 3.0625 inches, and that the volume was 962. 3.0625-4-962=.003. Then the volume of steam at 30 pounds is8-41, which being multiplied by .003=2.5 inches, the lengthof line 30. Xext the volume at 35 pounds=728. Multiply-ing this… … steel rule with decimal graduations. It is not expected thatthe cut Fig. 216 will be found accurate enough in its meas-urements to serve as a standard: it being intended only toserve as an illustration of the process. The diagram fromwhich the illustration was drawn was taken from a 600H. P. engine…
