JOURNAL OF THE COLLEGE OF SCIENCE, IMPERIAL UNIVERSlir, 

 TOKYO, JAPAN. 



VOL. XXV., ARTICLE 9. 



On the Partition of Silver between 

 Zinc and Lead. 



By 

 G. N. Potdar. 



The study of the meltiog points of alloys has demonstrated 

 beyond a doubt that the laws of dilute solutions apply to metallic 

 mixtures in which one of the components greatly preponderates 

 over the others. Consequently the law of the constant partition 

 coefficient must also obtain for them. The experimental verifica- 

 tion, however, has so seldom been undertaken that it may not be 

 uninteresting to add a well defined instance. For this purpose 

 I have at the suggestion of Prof. Ikeda, investigated the system 

 zinc-lead-silver, because it has some additional interest in con- 

 nection with Pakkes' process of desilverisation of lead. 



This system has already been studied by Weight and 

 Thompson.^^ They melted the three metals in various proportions 

 at temperatures ranging between 7öO° and 850"^, and allowed 

 the melt to stand eight hours in order that the separation of 

 the two layers might be complete. They then determined the 

 composition of these layers by analysis. The results obtained 

 by them are given in Table 1. 



1) Pruceedings of the Royal Society of London, 4S, (1890), 25-45. 



