St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 132
Fig. igi. tie or part of the outfit can be made hot by simply turn-ing a switch. Fig. 191 .shows an ele(5lric heater placedunder a car seat. Many large industries that make useof the heating efEecls of the current are now beingcarried on. CHAPTER XXI. HOW LIGHT IS PRODUCED BY THE INCANDESCENTLAMP.… … We have just seen that theeledtric current produces heatwhen it flows through a con-dudtor that offers considerableresistance to it. As soon asthis was discovered men beganto experiment to find whethera pradtical Hght could also beproduced. It was found thata wire could be kept hot byconstantly…
Electricity
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