MR. J. S. TOWNSEND ON MAGNETIZATION OF LIQUIDS. 
549 
tional to H, so that 89 = H f(t) where f differs from the different atoms according to 
9 0 and the initial circumstances. 
The intensity I of magnetization is equal to 
% yr M cos 6 dt, 
I Jo 
where M is the magnetic moment of the molecular magnet, and T a time which is 
large compared with the periods. 
Therefore, 
I = 2 -^rf M (cos 6q — 86 sin 6 0 ) dt, 
i J 0 
I = HS-^r j M sin 9 0 f(t) dt. 
1 Jo 
This explanation accounts for diamagnetism, for if we consider the very simple case 
of a magnet rotating rapidly in the horizontal field of the earth, the effect of the 
applied force H will be to make the north pole move more slowly when it is south of 
the axis of suspension than when it is north, so that its mean position is south of the 
axis of suspension, thus causing the magnet to act like a diamagnetic body. 
The following table shows the values of 10 7 & for salts in solution, w being the weight 
of salt per cub. centim., the forces ranging from 1 to 9 C.G.S. units. 
107*. 
Fe 2 Cl 6 . 
916m> - 7-7 
Fe 2 (S0 4 ) 3 . 
745w - 7-7 
I e 2 (NU 3 ) 6 . 
615 w - 7-7 
FeCl,. 
908w -7- 7 
Fe 2 S0 4 . 
749 w - 7-7 
