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278 HYDROUS EARTHS, OXIDES, AKD ACIDS. Opaque. Lustre resinous, inclining to vitreous. Yellowish- brown... blackish-brown. Streak yellowish-brown. Brittle. h = 5 0.. .5 5. g = 3'4...3'95. Conducts electricity. In the matrass yields water. Before the blowpipe on char coal becomes black and magnetic. With borax in the inner flame melts into a green glass. Is soluble in warm hydrochloric acid, frequently leaving a residue of gelatinous silica. Ue 2 IU, red oxide of iron 85‘56, water 14-44, usually contain ing an admixture of silica. Analyses of limnite a fibrous from Horhausen by Schon- berg, i pitchy iron ore from Siegen, c fibrous from Kamensk in the government of Perm, d pseudomorphous after pyrite, all by v. Kobell, e very pure ‘ glaskopf ’ from the Kuhbach mine near Biibeland in the Harz by Amolung, f from Cornwall, G = 3'98, by Yorke: — a b c d e f Bed oxide of iron 82‘27 82'87 83‘38 82'24 86 - 77 82’18 Phosphoric acid . — 3'00 oxide of manganese ri3 Water .... 13-28 13-48 15-01 13-26 13 23 14'28 Silica .... 4"50 0'67 1 - 81 4‘50 — 2-42 Occurs in fine fibres united into globular, reniform and sta- lactitic aggregations, having a radiating fibrous or curved lamel lar structure; compact and earthy; pseudomorphous after calcite, quartz, galena, fluor, blende, baryte, chalybite, pyrite, marcasite, wood and various shells. Is supposed to result from the decomposition of chalybite, pyrite, &e. Is found in Carinthia at lliittenberg and in the valley of the Lavant, in Stiria in beds in gneiss with calcite at Turrach and Eisenerz, in Hungary at Sirk, Dreiwasser near Bhonitz and in the county of Gomor, in the Biesengebirge in mica slate near Starkenbach, in Saxony at Schneeberg and Schwarzenberg, in Thuringia at Kamsdorf and Saalfeld, in Nassau, the llarz, the Tyrol, the Black Forest, Bohemia, Upper Silesia, in extra ordinary quantity in the Pyrenees, at Somorostro near Bilbao and other places in the Basque provinces of Spain, in Scotland at Cumberhead in Lanarkshire, in Mainland one of the Shet land isles, and in Hoy one of the Orkneys, in Cornwall at Botallack near the Land’s End and in Tin Croft mino near Bedruth, in Siberia, in the Brazils at Villa Bicca and Antonio Pereira, in the United States. 152. WAD.—Wad ; Phillips. Manganese oxide hydrate (in part) ; Hauy. Schaumartiger Wad-Graphit; Mohs. Man- ganschaum ; Hausmaun. Wad; Haidinger.
