between Uranium and Radium, 



487 



2S0 



200 



2 4 6 8 



Production of Radium from Purified Uranium. 



a 



Prep 



Years. 



0-22 

 2-66 

 5-15 

 5-49 



5-78 



5-91 



9-87 



1015 



uration IV 



(Years) 



Table II. 

 3 kilograms uranium. 



0-05 

 7-1 

 26-5 

 30-1 

 33-5 

 349 

 97-5 

 100-3 



Ea(XlO _12 g.). Growth 

 of Ra. 



40 

 56 

 104 

 104 

 117 

 116 

 244 

 242 





 16 

 64 

 64 

 77 

 76 

 204 

 202 



Growth 



(Time) 2 ' 



2-25 



2-41 



2-12 



2-30 



2-18 



2-095 



2-014 



1/A 2 (Years). 



95,500 



89,000 



101,000 



93,500 



98,700 



102,600 



106,600 



Mean of last live ... 100,500 



Preparation 



III. 



0-408 k 



ilogram 



uranium. 





T66 2-8 





4 













8-26 66-2 





23 



19 





0-287 



102.000 



8-39 70-2 





22 



18 





0-256 



114.000 



12-33 152 





46-8 



42-8 





0-281 



104.000 



12-58 1583 





51-8 



47-8 





0-302 



97.000 









Mean (omitting 



second) . 



.. 101,000 



