76 Weights of Radium and Thorium Emanations. 



Table VIII. — Diffusion of Thorium Emanation. 



Gasometer fell '562 mm. per minute. 



The Current o£ Emanation was started at 11.58 a.m. 





Leak for 30 seconds, in scale-divisions 





of the electrometer. 





Time. 







Vessel A. 



] 

 Mean. 



Vessel B. 



Mean. 



12.40 p.m. 



268 





... 





12.43 „ 







115 





12.54 „ 



283 









12.57 „ 







120 





104 „ 



277 









1.07 „ 





283 



128 



119 



1.11 „ 



301 









1.14 „ 







118 





1.17 „ 



270 



1 







1.20 „ 







lis 





1.23 „ 



298 









1.26 „ 







lie 





Table IX. — Natural Decay of Emanation. 



Gasometer fell '465 mm. per minute. 

 Air-current started at 12.38 p.m. 





Leak for 30 seconds, in scale-d 



rvisioDS of the electrometer. 



Time. 











Mean corrected to 





Vessel A. 



Mean. 



Vessel B. 



Mean. 



rate of flow 562 mm. 

 of gasometer per min. 



■ 2.21 p.m. 



265 











2.24 „ 







200 







2.27 „ 



257 











2.30 „ 







203 







2.33 „ 



249 



259 





202 



211 



2.36 „ 







194 







2.39 „ 



265 











242 „ 







201 







2.45 „ 



261 











2.48 „ 







211 







10. Calculation of ^ 



In Table X. are given the mean ionization currents in 

 A and B. For simplicity of calculation the ionization currents 

 in A are reduced to 100. 



