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APPENDIX. CONTAINING MINERALS THE COMPOSITION OF WHICH IS UNKNOWN OB DOUBTFUL, AND WHICH ARE OTHERWISE IMPERFECTLY DESCRIBED. GOLD AMALGAM. — In small wliite globules, i in the platinum stream-works of Columbia. Analysis by Schneider:— mercury 67'40, gold 38-30, silver 5-oo. KANEITE. — In granular masses. Lustre metallic. Greyish-white. G = 5'5. Mn a As. Analysis by Kane:—man ganese 45'5, iron a trace, arsenic 6l - 8. Saxony. APIIT1IONITE. — Steel-grey, compact, g = 4-87. Melts easily before the blowpipe. Analysis by Svanbergsulphur 30-05, antimony 24 77, copper 32’9l, silver 3’09, lead 0'04, zinc 0-40, iron i p 3l, cobalt 0'49, stony matter l - 29, arsenic traces. Is found in Wermskog in Wermland in Sweden. BKONGNIAKDITE.—(Damour. Annales de Mines, t. xvi. 1819. 227.) Fracture uneven. No cleavage observed. Lustre metallic. Streak blackish-grey, it above 3. G = 5'950. In the matrass decrepitates, fuses and yields a slight orange sublimate in the lower part, and a white sublimate above. In the open tube emits fumes of sulphur, and deposits a white sub limate of oxide of antimony. Before the blowpipe on charcoal melts below redness, emits the odour of sulphur and white fumes, and leaves a globule of silver surrounded by a yellow areola of oxide of lead. Partially decomposed by nitric acid. Soluble in a large quantity of boiling hydrochloric acid. Pb + Ag + sb, sulphur 19'08, antimony 30-66, silver 25-65, lead 24-61. Mean of three analyses by Damoursulphur 19-24, antimony 29-77, silver 24’77, lead 24-91, copper 0-02, iron 0-26, zinc 0-36. Was found associated with pyrite in Mexico. E c G