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558 URANIUM. brass-yellow colour; with borax it yields a yellowish green glass; it dissolves in nitric acid without efferves cence, and communicates to it a lemon-yellow colour. Constituent Parts. Cornwall. Oxide of Uranium, with a trace of Oxide of Lead, - . 74.4, Oxide of Copper, - - 8.2 Water, - - . 154 Loss, - - 2. Gregor, in Annals of Phil, vol. v. p. 284. Geognostic Situation. It generally occurs in ironstone veins in granite, and is very frequently accompanied with ochry and com pact brown ironstone, compact red ironstone, pitch ore, uran-ochre, iron-flint, jasper, quartz, hornstone, indurated clay, rarely with olivine ore, and black and yellow cobalt- ochre. Geographic Situation. It occurs at Carharrak, '1 incroft, Tol-carn, near Redruth, Iluel Jewel, Stenna gwyn near St Austle, at Gunnislake, near Caliington, 111 Cornwall ; at Johann- georgenstadt, Fibenstock, and Schneeberg in Saxony; in veins in granite at St Symphorien near Autun ; and in the same species of rock at St Yrieux, near Limoges* in France. 3 Uran-Oehrc. Uranocker, Werner. This species contains two subspecies, viz. Friable Uran-ochre, and Indurated Uran-ochre. First