1893.] 



On certain Ternary Alloys. 



541 



Fig. 4 represents these values, the outer dotted line, No. 1, in- 

 dicating the corresponding curve for lead-zinc-antimony alloys, and 

 that marked No. 2 the similar curve for bisrnuth-zinc-tin alloys 

 (Part V), all referring to the same average temperature of 650, or 

 thereabouts. 



The points marked A, B, C, D indicate four mixtures that did not 

 separate ; viz. : 



By means of Stokes' second method, the limiting values are deduced, 

 A + A' = 45'5, B + B' = 119'5 ; whence the composition at the 

 limiting point is 



