Phil. Mag. Ser. 6, Vol. 9, PI. 



Fig. 1.— High-Frequency Alternator. Two-fifths full si 

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Fig. 2.— Higli-Frequency Alternator. Two-fifths full sis 



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Fig. 3.— Firc,t Mi_Mh.nl ..i'.lnun- Ili^h-r'iv.jnnirv Alternator. 1 inch = l foot. 



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