CUPRUM,
OR
COPPER.

§ 188.

Its ſpecific gravity is 8,876. Nitrous acid diſſolve it readily, muriatic acid ſlowly, and the vitriolic requires intenſe boiling. The phlogiſton, ſeparated in the ſolution of 100 parts, may be expreſſed by 312. The weakeſt vegetable acids act upon it, eſpecially after calcination, and ſo do alkalies, the volatile alkaly eſpecially. With reſpect to the power with which it retains the phlogiſton, copper holds the eighth place. It melts with 1450 degrees of heat.

§ 189.

CUPRUM nativum (copper native). Native.

Cronstedt Min. § 193.

It’s rarely found without ſome alloy of gold, ſilver or iron; but I have not yet fully examined it.

§ 190.

CUPRUM calciforme (copper), ſimply deprived of its phlogiſton. Calciform.

Cronstedt Min. § 195.