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Break-Spark in an Inductive Circuit. 

 Fig. 4. — Carbon and Tin. 



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6 8 10 12 



Current in Amperes. 



M 



20 



Fig. 5. 



Nickel and Aluminium. 





































CX£L 

 VM/A//U/ 



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fff/xei 



■D POL£ 



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A/SCAT/ 1 



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8 10 12 



Current in Amperes. 



20 



