1893.J 



On certain Ternary Alloys* 



535 



Cadmium 67'8 



Lead 19-6 



Zinc 12-6 



100-0 



This mixture is represented by the point C in Fig. 1, obviously 

 lying distinctly inside the critical curve for about 600, although 

 necessarily outside that for about 650. 



Similarly, four mixtures that did separate at 650 gave points 

 belonging to a curve lying well inside that obtained as above for. 

 about 600 ; averaging the results in pairs as usual, the following 

 values were obtained : 



The line AB represents the portion of the right-hand branch of the 

 critical curve thus traced out at about 650, obviously lying well 

 inside that found at near 600 ; the corresponding points on the left- 

 hand branch lie close to the point P, approximately corresponding 

 with the ratio Pb 2 Cd. 



Mixtures of Bistmith, Zinc, and Cadmium. 



A series of twenty compound ingots (forty alloys) gave the follow- 

 ing average results ; in the earlier cases the bismuth and zinc were 

 employed in equal quantities; in the later ones the proportion of 

 zinc was increased up to 1J times the bismuth : 



