MAU.NKTIZA'I'IUN i»F XICKKI, 



:i91 



The yciieral cuuclusiuii f'rum these experiiiieiil^ is that iii a weak 

 field of .oi units, the increase of load makes the manner of ehanye of 

 magnetization in nickel under tlie influence of cyclic twisting depart 

 more and more from any slight resemblance which at small loads it 

 seemed to bear to the manner of change for ir(jn. For still smaller 

 load, then if might be possil)le to olttain the magnetization curve just 

 opposite to that of iron. 



In the second sei-ies of experiments, the strength of the field was 

 raised to ^.17 units. The load at first a])plied was onlv the weight 

 of the brass wire attached to the lower end of the nickel wire, and a 

 brass rod which gripped the wire fluring the pr(icess of twisting. This 

 load was .0:^ kg., that is, a tension of Î.6 kgs. weight per sq. cm. With 

 this amount of longitudinal stress, the succcssi\c twistings and un- 

 twistings were performed 7 times, and the following readings of 

 deflection were taken : — 



