470 Intelligence and Miscellaneous Articles. 



The observations were conducted with alternate loading and 

 unloading, the strength of field remaining constant. The load 

 never exceeded 1 kilog. per sq. mm. cross section of the wire. 



With small strength of magnetization under 2 C.Gr.S* units and 

 with the smallest loads, soft annealed nickel shows a small decrease 

 of magnetism, with somewhat larger an increase, which may rise 

 to 26 per cent, of the total magnetism, and finally again a decrease 

 with increasing load. 



Thus, for example, for the intensity of magnetization 1 = 0*97 

 C.GkS. units with a load of p gr. per sq. millim. cross section, there 

 were obtained the following respective variations of magnetization 

 SI 



v° 



SI/I. 



p. 



l\ft. 



28 



-0-006 



347 



+0-067 



46 



-0-011 



490 



+0-042 



63 



-0014 



738 



+0-257 



102 



-0-019 



904 



+0162 



165 



-0029 



977 



+0155 



246 



+0-015 







With stronger magnetization the increase becomes continually 

 smaller ; moreover after-effects of the preceding loading and phe- 

 nomena of hysteresis show themselves to a considerable degree. 



Hard-drawn nickel presents the same phenomena with much 

 stronger magnetization still, even though in feebler degree. 



Thus with a hard-drawn nickel wire, for 1=55*5 C.Gr.S. units 

 the variations of magnetization with a load of p gr. per sq. mm, 



p- 



Sift. 



p. 



sift. 



9 



-00034 



84 



+0-0187 



18 



-00052 



113 



+0-0180 



27 



-00054 



246 



+0-0122 



33 



-0-0062 



360 



+00080 



42 



+O-0081 



490 



-00304 



56 



+0-0186 



740 



-0-0682 



We may therefore assert that, with reference to the above- 

 discussed phenomena, the behaviour of nickel agrees well with that 

 of iron quantitatively but not qualitatively. 



The detailed communication of the method of experimenting and 

 the results will be given in another place. — JSitzb. Wurz. Pliys.-med. 

 Ges. March 11, 1893. 



