an Atomic Model. 



209 



more complicated, the three balls taking turns in the centre. 

 The motion reminds one of a complicated game of leap-frog. 

 With a number of balls the motion becomes very complicated. 



Fig. I. 



AW< 



a 

 M 



M 



-oC 



M 



cr 



m 



>HIB 



The mercury at the edges of the box is stationary while the 

 central portion is rotating. The angular velocity increases 

 as we go from the edge to the centre. The balls floating on 

 the surface tend to take up the same angular velocity as the 

 mercury upon which they float. There is a tendency for the 

 balls to take up a motion which may approximate to planetary 

 motion. Thus we may assume that they obey Kepler's law. 

 In the Mayer experiment, when the balls are stationary, when 

 there are a number of rings any one ball is held in its place by 

 the central force of the magnet and the mutual repulsion of 

 the neighbouring balls. The balls of one ring fit into the 

 crotches of the neighbouring rings. When the balls are not 

 stationary and the angular velocity of the outer ring is less 

 than that of the inner ring, there is a slipping of one ring 

 with respect to the one next to it. This slipping produces a 

 perturbation or a vibratory motion which is superimposed on 

 the regular circular motion. This perturbation may be said 

 to be the source of some sort of radiation, light perhaps. 



When a ball from the outside is allowed to come into the 

 system there is a great disturbance of the whole system. If 

 the balls represent electrons, this disturbance may be said to 

 be the source of the X rays, as when a cathode ray hits a 

 platinum atom, say. 



Phil. Mag. S. 6. Vol.- 33. No. 194. Feb. 1917. P 



