170 



Dr. Aider Wright and Mr. C. Thompson. [Feb. 12, 



On comparing together the relative effects on the solubility of; 

 bismuth in zinc and of zinc in bismuth produced by the simultaneous 

 presence of tin or of silver the same general result is deduced as in 

 the case of lead-silver-zinc and lead-tin-zinc alloys, viz., that in each 

 instance the solubility is considerably more increased by the presence 

 of a given proportion of tin than by that of the same amount of silver. 

 If 100 parts of zinc can take up m parts of bismuth in presence of 

 x parts of tin (or silver), and if 100 parts of bismuth can take 

 it, parts of zinc in presence of parts of tin (or silver), then the 

 lollowing tables give the correlated values of m, n, and a?, these values 

 being minima in the case of alloys containing silver, i.e., being deduced 

 i'l-oiu those experiments where the influence of the presence of the com- 

 pound AgZn 5 in increasing solubility was eliminated. 



