excited by the a Rays of Polonium. 405 



The results given in these tables are plotted in figs. 2, 3, 

 4, and 5. The curve drawn on the first half of each figure 



Fig. 2. 

 uo'C Air. 



-215 



^^♦-/«5- 



-37. f 



S 10 IS 2.0 



Current m Magnet "&0-6 



shows the way the rate of charging of the polonium decreased 

 or increased with the time until it became approximately 

 Phil. Mag. S. 6. Vol. 24. No. 141. Sept. 1912. 2 E 



