Modern locomotive engineering, with questions and answers .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co · leaf 236
essure, and they can both be obtained fromthe diagram by measuring with the scale adapted tothe spring used. Thus, in Fig. 105 the absolute initialpressure measured from the line of perfect vacuum Vto line B is jj lbs., and the absolute terminal pressuremeasured from V to line B is 21 lbs. The… … Figure 105 Rule. Multiply absolute initial pressure by thehyperbolic logarithm of number of expansions plus I,and divide product by number of expansions. Thus,referring to Table 14, it will be seen that the hyper-bolic logarithm of 3.65 is 1.2947, to which I must be added. Then — ^ = 48.4 lbs.,…
Locomotives
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