1891.J 



On certain Ternary Alloys. 



167 



Again, the curve obtained by plotting the silver and zinc percent- 

 ages in the heavier alloys as abscissae and ordinates respectively 

 exhibits (No. 1, fig. 6), first, a rapid rise in the quantity of zinc pre- 



sent, followed by a fall to such an extent that the zinc present, 

 reckoned per unit of bismuth, diminishes down again to an amount 

 considerably below that present in the binary bismuth-zinc [alloy con- 

 taining no silver ; a minimum of zinc is finally attained, after which 

 the zinc present relatively to the bismuth rises continuously. 

 VOL. xux. N 



