. Scientific American Volume 92 Number 04 (January 1905) . rrent ? A. Thereshould be no fire set by a battery Bo the batteries have to be switched in, oris it not necessary ? A. The battery is broughtinto action by closing the switch. At othertimes it is not in action. (9526) D. M. asks: To decide a dis-pute, will you kindly answer which is correct,A or B ? A holds that the electric currentwhich runs a trolley car passes through themotor, thence by the wheels to the rails and isthen diffused, and that it does not have to goback to the power house by either the railsor the earth. B h
. Scientific American Volume 92 Number 04 (January 1905) . rrent ? A. Thereshould be no fire set by a battery Bo the batteries have to be switched in, oris it not necessary ? A. The battery is broughtinto action by closing the switch. At othertimes it is not in action. (9526) D. M. asks: To decide a dis-pute, will you kindly answer which is correct,A or B ? A holds that the electric currentwhich runs a trolley car passes through themotor, thence by the wheels to the rails and isthen diffused, and that it does not have to goback to the power house by either the railsor the earth. B holds that it goes back tothe power house by the rails or the earth,thereby making a complete circuit. A. Thetheory accepted at present is that the electriccurrent, after passing from the overhead trol-ley through the motor and the wheels to therails, is by the bonds of the rails and therails themselves conveyed back to the dynamo,which is connected by a metallic circuit tothe rails for that purpose. There Is some January 28, 1905. Scientific American. 91. TheWorld To-Day
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