552 PROFESSOR C. G. KNOTT ON MAGNETIZATION 



tures. My result with the transverse field is that the decrease of resistance, or the 

 increase of conductance, passes through a minimum and then through a maximum 

 before it vanishes in the highest fields. 



We have therefore an indication that, at a temperature a little below that at which 

 the nickel loses its magnetic susceptibility, the conductance becomes peculiarly sensitive 

 to the influence of magnetizations, especially when the magnetizing force is considerable. 



If we try to apply to the phenomenon the electron theory which Professor J. J. 

 Thomson has used with great ingenuity, we are compelled to assume that electrons 

 suddenly acquire more freedom of motion or greater ease of disentanglement at a 

 temperature of 320° or so. This may be due to a change of orientation of the groups 

 of magnetic molecules between which the electrons pass, or it may be due to removal 

 of deflecting forces acting on the electrons. It may be safely assumed that the 

 phenomenon is closely related to the change of sign of the Thomson Effect as discovered 

 by Tait in 1S73. It is quite within the limits of probability that the breaking up of 

 groups, and the rearranging in stabler configurations as the temperature rises through a 

 particular value, may be accompanied by a greater freedom of electronic convection. 



[Appendix. 



