Part 27

§ 229.

COBALTUM (cobalt), contaminated by iron and vitriolic acid. Vitriolic.

CRONSTEDT Min. § 250.

§ 230.

COBALTUM (cobalt), mineralized by ſulphur, arſenic and iron. Glanz-cobalt.

CRONSTEDT Min. § 251.

§ 231.

COBALTUM (cobalt), mineralized by ſulphur, arſenic, iron and nickel. Kupfernickel.

CRONSTEDT Min. § 252.

ZINCUM OR ZINC.

§ 232.

Its ſpecific gravity is 6,862. All the acids diſſolve it readily and with efferveſcence, which denotes its very lax union with the inflammable principle, as was remarked before (§ 219). 182 expreſſes the quantity of phlogiſton it loſes in ſolution. It melts in a heat of 699 degrees; and if the heat be a little increaſed it takes fire; and diſſipates in white flowers.

§ 233.

ZINCUM calciforme (zinc), calciform ſimply deprived of its phlogiſton. Calciform.

CRONSTEDT Min. § 228. A. Lapis calaminaris.

It is almost always mixed with clay or calciform iron.

§ 234.

ZINCUM (zinc), mineralized by aerial acid. Aerated.

CRONSTEDT Min. § 228. A. 1.

§ 235.

ZINCUM (zinc) with aerial acid and mixed with ſiliceous matter. Siliceous.

D. A. BORN ſent me chryſtals of this ſpecies, which expoſed to the fire gave out aerial acid, but they were not wholly ſoluble in acids.

§ 236.

ZINCUM (zinc), mineralized by ſulphur and iron. Black jack.

CRONSTEDT Min. §§ 229. 230. Pſeudogalena.

ANTIMONIUM OR ANTIMONY.

§ 237.

Its ſpecific gravity is 6,860. Aqua regia diſſolves it well; vitriolic acid requires boiling; muriatic and acetous acids act hardly at all upon it, unleſs previouſly calcined. The nitrous acid corrodes it ſo as to prevent the ſolution. The phlogiſton it loſes in ſolution is expreſſed by 120, and with reſpect to the force wherewith it retains this, it ſtands in the ſixth place. It melts at a heat of 809 degrees.