36 



ART. 6. — K. HONDA AND S. SHIMIZU. 



In weak fields, the intensity of magnetization gradually in- 

 creases, as the temperature falls, till it reaches a maximum, and 

 then gradually decreases. As the field is increased, this maximum 

 recedes towards lower temperatures, and beyond 50 C.G.S., the 

 maximum altogether disappears. These changes are common to 

 nickel steels of 29.249^ to 28.32?^ Ni. In 24.04?^, 24.40?-^ and 

 26.64^0 Ni, the maximum does not appear from the outset, i.e., 

 as the temperature falls, the intensity of magnetization at first 

 rapidly increases and soon approaches to an asymptotic value for 

 every magnetizing field. 



{b) Length change of nickel steels. 



The magnetic change of length of nickel steels is given in 

 Table IX and in Fig. 4 c, d, e, f, g, h, i, from which the curves 

 of the change of length for constant fields are obtained and 

 drawn in Fig. 5 a, b, c, d, e, f, g. 



TABLE IX. 



NICKEL STEEL 29.24?^'. NICKEL STEEL 29?^. 



