872 
greater part of the result of the second variation is represented in 
the magnetization tensor. 
Consider once more the complete polarization (6.3 and 6.2) : 
neler tor | zegel +4265 OEE 
eS e 5 Owe ; 
oh 
dal) 5 9 Owe Owe 
Here Neot is the term, by far the most important, which results 
from the first variation. It is difficult to tell in a few words. which 
part from the second order terms is exactly the polarization of moving 
magnetism. If the 7 are so chosen that 7%) vanishes in stationary 
points, then we can say that the greater part of 
dp 8 I Neo ge 
BING NO da == ON clo" 
figures in the polarization tensor. A small fraction of it (in as much 
as JN is no scalar) appears, however, in the magnetization tensor, 
together with 
do ; Owe 
— 1 Ne Grl4) TD ee 
2 oO SUE 
as the polarization of moving magnetism. But we refrain from 
entering into detail here. 
