232 CERIUM 



containing about 10 idc/Viter of Ce^'*^-Ce^^'*. Also, soil was used contain- 

 ing 0.233 Aic/g. The plant tissue was dried at 100°C and ground, and 

 aliquots were spread in milk-ashing capsules and counted with an end- 

 window tube (Ce-2). 



Ce-1. Kawin, Bergene, D. H. Copp, and J. G. Hamilton: Studies of the Metabolism of 

 Certain P'ission Products and Plutonium, UCRL-812, Aug. 7, 1950. 



Ce-2. Jacobson, Louis, and Roy Overstreet: The Uptake by Plants of Plutonium and 

 Some Products of Nuclear Fission Adsorbed on Soil Colloids, Soil Set., 65: 

 129-134 (1948). 



