When melted, it ſmokes but has no ſmell of arſenic.
ARGENTUM nativum (ſilver native), united to arſenic and iron. Native.
The three metallic ingredients are nearly in equal proportions.
All the ſpecies hitherto mentioned have metallic properties and appearances. The contaminating matters are ſometimes extremely ſmall, but not to be neglected when they exceed ¹⁄₃₀₀ part of the maſs.
ARGENTUM (ſilver) mineralized by the vitriolic and muriatic acids. Hornlike.
Cronstedt Min. §177. Minera argenti cornea. Horn-ſilver.
Mr. Woulfe[[62]], detected the preſence of the vitriolic acid. The ſilver ſeldom exceeds ⁷⁰⁄₁₀₀. I know not whether it is ever altogether free from vitriolic acid.