. An elementary book on electricity and magnetism and their applications. Gas Inlet Fig. 420. — Poulsen-arc generator. with a copper pipe carrying water for cooling the walls. Suchan arc can deliver several kilowatts of high-frequency power. •g O 55 q. ELECTROMAGNETIC WAVES 565

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmagnetism, bookyear19