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 1258
Fig. 5 5 0. Fig. 551 Fig. 550 pedestal panel for main and equalizer switches small capacity Fig. 551main and equalizer switches for large capacity If this were not done the fields would act like a kicking,or spark coil and their insulation be damaged. In Fig. 556 is seen the diagram of the panel… … Fig. 552 BEAR VIEW OF FIG. 551 1230 Steam Engineering
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