1889.] On certain Ternary Alloys. 475 



Series V. Zinc double the Lead present. Temperature near 750. 



On plotting these two series it is obvious that the curves are prac- 

 tically identical in both cases ; indicating, as above shown, that little, 

 if any, sensible difference is brought about by a considerable tem- 

 perature variation in the way in which a given mass of metal divides 

 itself on standing. On the other hand, whilst the solubility curves of 

 zinc in lead-tin and of lead in zinc-tin thence derived are sensibly the 

 same as those derived from Series III, the tin distribution curves are 

 by no means identical therewith, especially with the highest tin per- 

 centages. 



Another series of mixtures was then prepared with zinc and lead in 

 the proportions 1 to 2. The following values were obtained from 

 twenty ingots fused about eight hours at a temperature close to 650. 



Series VI. Lead double the Zinc present. Temperature near 650. 



