Part 19

CRONSTEDT Min. § 176, 8. Galena.

The ſilver is only a few half ounces in a hundred weight.

§ 166.

ARGENTUM (ſilver), mineralized by ſulphur and arſenic. Red.

CRONSTEDT Min. § 170. Minera argenti rubra.

It contains about ⁷⁰⁄₁₀₀ of ſilver. Iron is frequently preſent, as in moſt other ſpecies but not always.

§ 167.

ARGENTUM (ſilver), mineralized by ſulphur, arſenic, and iron. Glittering.

CRONSTEDT Min. § 172.

I have examined ſome ſpecimens from Saxony which ſometimes contain no ſilver. May we not therefore ſuppoſe that the ſilver is native and not mineralized?

§ 168.

ARGENTUM (ſilver), mineralized by ſulphur, arſenic, iron and cobalt.

The ſilver is ſometimes more than ⁵⁰⁄₁₀₀.

§ 169.

ARGENTUM (ſilver), mineralized by ſulphur, arſenic, copper and iron. White ore.

CRONSTEDT Min. § 171. Minera argenti alba.

The proportion of ſilver varies much, ſometimes it is ¹⁰⁄₁₀₀ or more.

§ 170.

ARGENTUM (ſilver), mineralized by ſulphur, arſenic, copper, iron, and antimony. Grey ore.

CRONSTEDT Min. § 173. 6. Minera argenti griſea. In the province of Dal.

It contains ²⁴⁄₁₀₀ of copper, ſeldom ⁵⁄₁₀₀ ſilver.

§ 171.

ARGENTUM (ſilver), mineralized by ſulphur, arſenic, antimony and iron. Plumoſe.

CRONSTEDT Min. §173. 5. Federertz of the Germans.

It ſeldom contains more than a few half ounces of ſilver in the hundred weight.

It is abſurd to found ſpecies upon the differences of the matrix: theſe ought to be conſidered elſewhere.

HYDRARGYRUM, OR QUICKSILVER.

§ 172.