1 »s Browning and Flora — Ceric Chromate. 



Salt examined. Ce(Cr0 4 ) 2 2H 2 



calculated. 



Ce0 o -. 41-94 CeO a .._. 4214 



Cr0 3 " 49-61 Cr0 3 49.04 



HO S'82 HO 8-82 



100-37 100-00 



From these analyses we feel justified in assuming the crys- 

 talline salt to be a close approximation to a compound whose 

 constitution would be expressed by the symbol Ce(0rO 4 \ * 

 2H 2 0. 



The material from which the mixed oxides used in this work 

 were obtained was a mixture of sulphates of cerium lanthanum 

 and didymium, carrying a trace of yttrium. 



The authors are indebted to Mr. J. C. Blake for the crys- 

 tallographic examination. 



