THE LOCALISATION OF BREAKS AND FAULTS. 



483 



galvanometer is afterwards put in circuit by the small key 

 shown, which connects the galvanometer with the bar B. 

 The " Silvertown " mixing key, designed by Mr. W. A. 



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Pftlli 



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Fig. 267.— Price's Mixing Key. 



Fig. 268.— "Mixed Charge" Test with Price Key. 



Price, is illustrated in Figs. 267 and 268. Two contact 

 blades, a and b, are rigidly connected at their fulcrum by an 

 insulated bar. A handle is attached to the bar,^by means of 



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