291 



Y. KOGA & O. Y AM AG ATA. 



The narrow strips thus obtained were cut into smaller pieces 

 and assayed. The results of the assays are incorporated in Table II. 

 Assaying was conducted by the usual volumetric method. The 

 proportion of silver was estimated to tV of 1 per mille. When it is 

 given to the second place of decimal, the number is the mean of 

 several experiments. 



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