Copper. 269 



flame, but confumes and leaves afhes, from, 

 which copper is extra&ed. 



SPECIES XL 

 Copper in a foreign Form* 



34. Animal and vegetable fubftances are 

 fometimes found penetrated with copper. 



SPECIES XII. 

 Mineralized by the Vitriolic or Marine Acids. 



35. Thefe are mentioned and defcribed in 

 the fecond part : in the dry way they are re-* 

 ducible by Mr. Title t's flux. 



CHAP. V. 



Iron. 



I* Its fpecific gravity is from 7,6 to 8,0o ? 

 that of the moft dephlogifticated calx of iron, 

 only 6,7. It is foluble in all acids, and the 

 faturate folution precipitable by vegetable 

 aftringents of a black colour* and by P ruffian 

 alkali of a blue ; in its metallic or flightly de- 

 phlogifticated ftate it is attraftable by the mag- 

 net > it is the moft difficultly fufible of all 

 metallic fubftances, except platina and man- 

 ganefe. 



SPECIES L 



