Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 551
ngineenng Starting with line E 26^ it has been noted that its lengthis 3.0625 inches^ and that the volume was 962. 3.0625-^962^.003. Then the volume of steam at 30 pounds is841, which being multiplied by .003=2.5 inches, the lengthof line 30. Next 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…
