1894.] 



On certain Ternary Alloys. 

 FIG. 1. 



Su. 



133 



CcU 



Al 



As regards the direction of slope of the tie-lines, it is noticeable 

 that they are similar in this respect to those obtained with aluminium- 

 bismnth-tin alloys, always sloping downwards to the right (i.e., the 

 heavier alloy containing a larger proportion of "solvent" than the 

 conjugate lighter alloy) ; with aluminium-lead-tin alloys, the lower 

 alloys exhibited a slope to the left, and the upper ones to the right, 

 presumably owing to the formation of a definite compound of tin 

 and lead (probably Pb 3 Sn), no analogue of which appears to be pro- 

 duced with either bismuth and tin or cadmium and tin. 



Alloys containing Aluminium and Lead (or Bismuth) as Immiscible 

 Metals, and Antimony as Solvent. 



It has been shown in Part YII that when antimony is used as 

 solvent metal, zinc and lead (or zinc and bismuth) being the immis- 

 cible pairs, the series of conjugate alloys producible are exactly com- 

 parable in general characters with the previously described ternary 

 alloys with tin or silver as solvent. Precisely the same remark 



VOL. LY. L 



