354 Dr. J. R. Ash worth on the Calculation of 



Nickel. 



R = 12*6 xlO 6 



if the atomic weight is 58*68, the density 8*9, and if the 

 molecule contains one atom. 



W = 20-8 when A = 0048 

 (Weiss & Bloch, Arch, des So. t. xxxiii. p. 293) ; 



therefore 



J ° = vS^ x 103 = m 



This value for I is considerably higher than what has 

 been observed. The calculation has been made on the 

 supposition that the molecule of nickel contains one atom ; 

 if, however, the molecule contains two atoms, then, putting 

 the molecular weight equal to 2 x 58*68 instead of 58*68, 

 the formula gives 



I„ = 552, 



and this is in reasonable agreement with the facts. Experi- 

 mental values are : 



479 Weiss, J. tie Phys. ix. p. 161. 1910. 



540 Ewing, Phil. Trans, clxxx. A. p. 221. 1889. 



Cobalt. 



R = 12*14 x 10 6 



if the atomic weight is 58*97, the density 8'6 y and if there is 

 one atom in the molecule. 



R' = 6*0 when A = 0*166 

 (Weiss, Arch, des Sc. 4 ser. t. xxxi. pp. 5 & 89). 



Hence 



= \/w xl03=1422 > 



which is very nearly the maximum magnetization which 

 different observers have found, namely, 



1310 Ewing, Phil. Trans, clxxx. A. p. 121. 1889. 

 1412 Weiss, J. de Phys. ix. p. 373. 1910. 



1421 Stifler, Phys. Rev. xxxiii. p. 268. 1911. 



