PHYSIOLOGICAL REMAINS. 201 



Silver with lead in any proportion. 



Silver incorporates with copper. Pliny mentions 

 such a mixture for &quot; triumphales statuae, lib. xxxiii. 

 9. Miscentur argento, tertia pars seris Cyprii 

 tenuissimi, quod coronarium vocant, et sulphuris vivi 

 quantum argenti.&quot; The same is true of brass. 



Silver incorporates not with iron. Wherefore I 

 wonder at that which Pliny hath, &quot; lib. xxxiii. 9. 

 Miscuit denario triumvir Antonius ferrum.&quot; And 

 what is said of this is true in the rest ; for iron in- 

 corporateth with none of them. 



Silver mixes with tin. 



Lead incorporates with copper. Such a mixture 

 was the pot-metal whereof Pliny speaks, &quot; lib. xxxiv. 

 9. Ternis aut quaternis libris plumbi argentarii 

 in centenas aeris additis.&quot; 



Lead incorporates with tin. The mixture of these 

 two in equal proportions, is that which was anciently 

 called &quot; plumbum argentarium, Plin. lib. xxxiv. 17.&quot; 



Copper incorporates with tin. Of such a mix 

 ture were the mirrors of the Romans. &quot; Plin. Atque 

 ut omnia de speculis peragantur hoc loco, optima 

 apud majores erant Brundusina, stanno et sere mistis. 

 Lib. xxxiii. 9.&quot; 



Compound metals now in use. 



1. Fine tin. The mixture is thus : pure tin a 

 thousand pounds, temper fifty pounds, glass of tin 

 three pounds. 



2. Coarse pewter is made of fine tin and lead. 



