66 



Proceedings of the Royal Irish Academy. 

 Table III. 



Time (minutes) 



« X 10-3 



1 

 fi 



X 10' 







829 





12 



20 



345 





29 



43 



219 





46 



74 



145 





69 



115 



103 





99-5 



- 154 



76 





132 



223 



50-4 





199 



Fig. 8 is the graph of n and the time, and fig. 9 that of - and the time, 

 showing that in this case as well the rate of disappearance of the nuclei is 

 900 



4-0 



80 



120 160 200 



Mi nutes 



Fig. S. 



240 



280 



proportional to the square of the number present. Further, as far as the 

 experiments have gone, there seems to be no appreciable difference in the 



