130 



Boltivood- 



—Radio-active 



Waters, Hot Spr 



wa^*, ^Lr&. 





Observed activity 



Days from 



Calculated 



Laboratory 



per 



liter water 



time of 



initial 



number. 



gx 10- 



-4= uranium. 



collection. 



activity. 



44A 





5-8 



7 



22-0 



45A 





0-9 



9 



4-4 



46A 





1*8 



9 



8-8 



47A 





8-1 



6 



23-5 



48A 





1-3 



7 



4-9 



50B 





1-7 



9 



8-3 



51B 





1-3 



8 



5-3 



52B 





0-17 



6 



0-5 



54B 





0-4 



7 



1-5 



55B 





2-1 



7 



8-0 



56B 





0-2 



8 



0-8 



59B 





3-4 



7 



12-9 



60B 





1-8 



7 



6-8 



61B 





4-9 



6 



14-2 



62B 





3-9 



7 



14-8 



63B 





25-6 



7 



97-3 . 



64C 





90 



6 



26-1 



65C 





5-0 



6 



14-5 



66C 





10-5 



6 



30'5 



67C 





2-5 



8 



10-2 



68C 





9-0 



6 



26-1 



69C 





13*8 



6 



40-0 



7oC 





91-6 



6 



265-6 



7lC 





3-6 



7 



13-7 



72C 





3-9 



7 



14-8 



Radio-activity of Water on Standing. 



A sample of water No. 39A was sealed up in a large recep- 

 tacle holding about twelve liters and allowed to stand undis- 

 turbed for thirty-two days. At the end of this period the 

 activity of the gases contained in the water was tested. The 

 activity was very low and was not greater than the natural 

 residuum which would remain from the emanation originally 

 present. This indicated that the water contained no radium 

 salts in solution. 



A quantity of water No. 70C, from which the gas had been 

 removed by boiling after acidifying with acetic acid, was 

 allowed to stand in an open vessel for two days, and was then 

 sealed up for twelve days longer. At the end of this time it 

 was tested for radio-active gases, but no radio-activity could be 

 detected in the gas which was obtained during the second boil- 

 ing operation. This also indicated the absence of radium salts 

 in solution. 



Residues from Water. 



About twenty liters of water from sources No. 39A and 67C 

 were evaporated to dryness and the residue tested in the elec- 



