810 



Mr. II . Carter on the Radioactive 

 Table I. (continued). 



Test 4. — Arc : Two consecutive blank tests. 



Electroscope shielded. 



Electroscope exposed. 



Time 

 (minutes). 



Deflexion. 



Temperature 

 (0° C). 



Time 

 (minutes). 



Deflexion. 



Temperature 

 (0° C). 







17-55 



16-65 







17-9 



16-75 



10 



16-75 



16-35 



10 



17 05 



16-6 



20 



15-9 



1655 



20 



16-5 



170 



30 



15-6 



16-65 



30 



16-1 



17-25 



40 



15-1 



16-8 



40 



16-05 



17-15 



50 



14-95 



16-55 



50 



15-85 



16-75 



60 



14-55 



162 



60 



15-2 



16-8 



70 



1405 



16-2 



70 



14-95 



17-1 



80 



13-5 



16-6 



80 



14-8 



17-15 



90 



131 



1695 

 Mean 1655 



90 



14-5 



16-85 

 Mean 16-95 



Fig. 2. 





















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