ELECTRUM. 19 Constituent Parts. Gold, 64. Silver, i - - 36 100 Klaproth, Beit, b iv. s. 3. Geognostic and Geographic Situations. It occurs, along with massive heavy-spar, or ash-grey- splintery hornstone, at Schlangenberg in Siberia. Observations. 1. The ancients applied the name Electrum, not only to amber, but also to a particular mixture of gold and silver, as appears from the following passage of Pliny: <<• Omni auro inest argentum vario pondere. Ubicunque quinta argenti portio est, electrum vocatur *. Hence Klaproth applies the name Plectrum to this mineral. 2. As this ore is not acted on, either by nitrous or nitro-muriatic acid, it follows, that the gold and silver are more than mechanically mixed. » B 2 III. ORDER. k P)in. Hist. Nat. Lib. xxxiii. cap. iv. § 23.