Active Deposit of Actinium in an Electric Field. Ill 



ments the above values o£ the cathode percentage calculated. 

 A condensed table, in which the values have been interpolated 



Fig. 2. 



CtftHode i 

 Percentage ■ 

 (Av) 

























oVotts 





[ — r " 





















eoo 

































— — 















Zoo 



- 







































.120 



n 





















































































s x n 



{ 1 













*o 







\ ^ 





















20 



m 







" 





•\ 





s — 



e 















1 





«-* 









a 



. 



— " 



~4-+ 



















































1S-2 



Diva, per second corresponding to total amount of emanation. 



from the curves to correspond to given amounts of emanation 

 at points sufficiently near the experimental values, is given 

 below, for purposes of reference : — 



Table I. 



Amounts 



Percentage Cathode Activity. 



















in 







10 



20 



40 



120 



200 



600 



980 



1700 



divs./sec. 



volts. 



volts. 



volts. 



volts. 



volts. 



volts. 



volts. 



volts. 



volts. 



•50 



170 



328 







85-1 





93-7 



947 





15 



110 



203 



410 



590 



83-9 





936 







20 



132 



189 



375 



54-5 



82-4 



88-0 









25 



132 



180 



34-5 



528 



81-2 



87-5 



936 



94-8 





35 



155 



170 



301 



49-2 



78-8 



863 



934 





949 



50 



132 



16-5 



266 



45-2 



765 



85-5 



934 



95-0 





8-0 



132 



150 



240 



40 



73 



83-5 



93-0 



95-0 



94 9 



It is to be noticed that the curves for 600 volts, 980 volts, 

 and 1700 volts are horizontal ; the last two being coincident. 



Owing to the presence of neutral deposit particles, even at 

 the highest potentials employed, it is necessary to correct, 

 for diffusion, all the experimental values of the distribution 

 of activity. This was done by obtaining experimental values 



