360 Mr. H. N. Allen on Energy Movements in the 



energy, we may regard them as preserving their identity 

 when the bodies approach, and as being absorbed by the 

 moving bodies, so that their potential energy is converted 

 into kinetic. A conductor moves in such a way that the 

 absorbed energy is a maximum. 



Fig. 1 also illustrates the rotation of the energy-cell as \he 

 particles approach. If on any one of the energy-paths, as 



Fig. 1. 



for instance (J . 7), the direction of the line of force (indi- 

 cated by a dotted line) cutting it at different points be 

 noticed, it will be seen that this direction constantly changes 

 as the particles approach, so that the tangent to the line of 

 force rotates about the point of intersection. The velocity 



