Chemical and Physical Papers. 

 Table II. Iron. 



For experiments ia the estimation of cobalt the nitrate was 

 used, the solution being standardized by conversion to the oxid 

 and reducing in a Rose crucible with hydrogen. The results 

 follow : 



Table III. Cobalt. 



These results indicate that, as was to be expected, the applica- 

 tion of this method may be extended to include the determination 

 of other metals, and must prove a valuable addition to the processes 

 at the disposal of the analytical chemist on account of its accuracy 

 and rapidity. 



We wish to express thanks to Prof. E. H. S. Bailey for interest 

 and encouragement, and to Dr. H. P. Cady for helpful suggestions 

 and the loan of apparatus. 



