52 PROF. KNOTT ON MAGNETIZATION AND RESISTANCE OF NICKEL WIRE. 
ment of small changes, which are indeed changes of the second order, namely, the 
change per unit rise of temperature of the change due to a given applied field. It 
would be utterly impossible, in the present state of knowledge regarding molecular 
groups, to make any prediction as to how the molecular change indicated by the 
thermoelectric and resistance peculiarities should show itself in the present case. A 
glance, however, at the isodynamics, with their cusp-like jpoint in the higher fields, 
and a tendency to a maximum in the lower fields, seems to indicate some peculiarity 
at this critical temperature of 200°. What seems to be indicated is, that about this 
temperature the change of resistance with magnetization begins to fall off more 
quickly as the temperature is raised. 
