Mam-ietised Iron, $c., cooled to Temperature of Liquid Air. 67 



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FIG-. 15. Mond's pure nickel, 



the magnetometer, and cooling them by immersing in liquid air, it 

 was found that the first effect of the cooling was to produce a small 

 diminution in the magnetic moment, and the subsequent heating in 

 some cases produced a further diminution of magnetic moment. In 

 the first sample of soft iron, the wire was about 3 cm. long, and bent 



