195 
k" 1 N E R A L O G Y. 
SECT. CC. 
4, Difiblved by the vitriolic acid. Cuprum acido 
rntrioli folutum : Vitnolum Veneris. See Sed. 
cX}^ii. 
5i With phlogiftoni Copper coal ore. See 
Sed. cki. 
SECT. CCL 
7. Iron, Ferrum'^ Mars. It is 
a. Of a blackifh blue fliining colour. 
b. It becomes dudile by repeated heating 
between coals, and hammering. 
It is attraded by the loadftone, which is 
an iron ore; and the metal itfelf may alfo 
be rendered magnetical. 
d. Its fpecific gravity to water is as. 7,645, or 
8000 : : 1000. 
e. It calcines eafily to a black fcaly calx; 
which, when pounded, is of a deep red 
colour. 
/. When this calx is melted in great quantity 
with glafs compofitions, it gives a blackifh 
brown colour to the glafs ; but in a fmall 
quantity a greenifli colour, which at laft 
vaniflies, if forced by a ftrong degree of 
heat. 
g. It is difiblved by all falts, by water, and 
like wife by their vapours. The calx of 
iron is difiblved by the fpirit of fea-falt, and 
by aqua regia. 
'h. The calx of the difiblved metal becomes 
yellow, or yellowiih brown ; and in a cer- 
tain degree of heat, it turns red. 
• O 2 
f The 
