336 



Scientific Proceedings, Royal Dublin Society. 



It will at once be noticed, on looking at the above table, that 



Curve of Brass. 



Curves of 

 German Silver. 





issn 



tmasai 



iHKrr!!^:^r^^:T"~a>^i 



— ^ ^1 



•50 

 •45 

 •40 

 •35 



•30 

 •25 



•20 

 •15 

 •10 



•05 



•00 grammes. 



6. 5. 4. 3. 2. 1. 0. hours. 

 Curves showing the Volatilization of Zinc from German Silver Alloys. 



the greatest amount of loss occurs in every case during the first 



