300 H. NAGAOKA. 



twisting will be diinininhed. This agrees with experiment. But 



again we saw that by sufficiently loading the wire, we could bring 



the apparent magnetization down to zero and eventually reverse its 



sign by mere twisting. Xow if this be due to the frictional rotation 



of° molecules, the molecules must, notwithstanding the directive force 



of 30 units, be rotated through more than a right angle fr.jm their 



first position, while the amount of mechanical twist amounts only to 



.079 radian per cm. in each direction. Admit it to be so ; what effect 



then may we expect increased loading to produce on the rotation of 



the molecules? The magnetic molecules in strong fields are acted on 



only by a greater directive force, and consequently they must tend to 



remain more in the direction of the magnetizing force ; l)ut why they 



should assume nearly the position of magnetic neutrality when they 



are subjected to sufficient longitudinal stress, is a question which 



every supporter of the theory of frictioually rotated molecules is 



bound to answer. 



