I have never found it free from martial impregnation.

§ 221.

ARSENICUM nativum (arſenic), native, united to ſilver.

§ 222.

ARSENICUM calciforme (arſenic), deprived of phlogiſton. Calciform.

Cronstedt Min. § 240.

§ 223.

ARSENICUM (arſenic), mineralized by ſulphur. Yellow.

Cronstedt Min. § 241. Auripigmentum. Riſigallum.

§ 224.