QUESTIONS TOUCHING MINERALS. 395 



So likewise of quicksilver. 



Quicksilver with lead. Quicksilver with brass. 



Quicksilver with copper. Quicksilver with iron. 

 Quicksilver with tin. 



sSo of lead. 



Lead with copper. | Lead with iron. | Lead with brass. 

 Lead with tin. (Plin. 34. ix.) 



So of copper. 

 Copper with brass. | Copper with iron. | Copper with tin. 



So of brass. 

 Brass with iron. | Brass with tin. 



So of iron. 

 Iron with tin. 



What be the compound metals that are common and 

 known ? And what are the proportions of their mixtures $ 

 As, 



Latten of brass, and the calaminar stone. 



Pewter of tin and lead. 



Bell-metal of &c. and the counterfeit plate, which 

 they call alchemy. 



The decomposites of three metals or more, are too 

 long to enquire of, except there be some compositions 

 of them already observed. 



It is also to be observed, whether any two metals, 

 which will not mingle of themselves, will mingle with 

 the help of another ; and what. 



