anl Iron Wires placed in Strong Magnetic Fields. 129 

 Fig. 5.— Nickel (-0159 mm. diam.). Temperature = 17 0, 5 C. 



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1.400 



1.300 



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20, 000 30.000 



Fig. 6. — Iron (-02J8 mm. diam.). Temperature = 17 0, 5 C. 



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Phil. Mag. Ser. 6. Vol. 21. No. 121. Jan. 1911. ' K 



