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Lead is eaiily known by its livid . colour, malleability, foftnefs, and the dead- 

 nefs of its found : its glafs is yellow, and folution in aqua fortis aqueous. 



IV °. Such as are of a more uniform texture, .and perfect nature ; and not fubject 

 to ruft, or to be confumed by fire : but if altered, in fome degree, by acids or a more 

 intenfe heat, may be foon reftored to their natural ftates without any fenfible lofs. 



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ARGENTUM 



Si 



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f i . Nudum van urn. 



2. Subvztreum, malleabile. 



3 . Diaphanum lamellofum. 



4. Albidum injorrfie fragile. 



5. Rubefcens polyedron glandulofum 

 \jb. Objcurum. 



L'. S. N 





This metal is eafily known by its whitenefs, weight, malleability, ductility, and 

 found. It is not apt to ruft, or wafte in the fire : its glafs is "red ifh, its ruft black, and 



its folution in aqua fortis white. 



2 . HYDRARGYRUM 



Quickfiher> or crude 

 mercury. 



1. 



Nudum, 



V 



2. Rubrum arfenicak. 



3 . Rubrum pyriticofum. 



4. Petrofum. 



L. S. N. 





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Quickfilver is eaiily known by its weight, volatility, fluidity, and filver colour : 

 its folution is white, and its calx red ; and though it mixes eafily, and intimately with 

 many fuhftances ; after it is apparently loft in them, a little fire, and fometimes oil, 

 will reftore it to its native form. 



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PLATINA 



Platine. 





Subgrifea jriabilis. 



The grey platine ore. 



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The ore of this metal is of a dark gray colour, and friable ; it is of a hxt nature, 

 and not fubjecl: to ruft, or to be deftroyed by fire : it blends very intimately with all 

 other metals, efpecially with gold ; and is next to it in fpecifick weight. It is dif- 

 folved only in aqua regia. 









4 . AURUM 



Gold. 



Nudum pefra. 

 Nudum miner<z. 

 Nudum agregati. 





L. S. N. 





Gold is the heavieft, and moft ductile metal we have yet known ; it is naturally 

 of a fine yellow colour, foft, malleable, and not fonorous, nor apt to ruft, or wafte 



in the fire : its folution in aqua regia (the only menftruum that diffolves 



is yel 



low, and its glafs violet. It is remarkable, that, [on putting fome athcr into a phial 

 with the folution of this metal, and making the mixture ; the gold quits the heavy 



acid menftruum, and incorporates with the lighter fluid at the top. 









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