the Excited Activity of Radium to the Cathode. 537 



It has only been possible to test the values o£ N , as given 

 by equation (4), very roughly, owing to the difficulty of 



o 

 o 



c 



S o $ £ 



ACTIVITY 



T» -j «> <o 

 a o o o 



S 























1 

























•+■ 





















x\ 



° \ ^ 





* 



















a. 



3 



f 

 i 





1 



















g ■■ 





>4 



















**1 *l 



-it *l 



i\ 11 



s 



















































8 



















( 





















































1= 



















T 































o 

 2 

 oS 

 -n 



m 







































































~c 

























finding the volume of vessel Y and its connexions, with 

 sufficient accuracy to determine the relative values of M in 

 the three sets of experiments. 



