544 HYDEOUS SULPHATES. quarries of alum shale at Freienwald in Brandenburg and near , Saalfeld in Thuringia; m the coal mines of Potschappel Burgk not far from Dresden; in the beds of brown coalbtlT Kolosoruk near Bilin, and of Friesdorf near Bonn; at Saldanha and Soeon-o in Columbia, Chivaehy near Bogota, Araya near Oumana, in the crater of the volcano of Pasto in Quito Co- quimbo m Chile, Pyromeni in Milo, the Solfatara of Naples. 376. WEBSTEEITE.—Subsulphate of alumina; Phillips; HaiSnger ° US S ’ HaU D AluHlinit 5 Mohs, Hausmann, Opaque. Dull. White. Streak white. Sectile. h = ro G = 1'6...17. t J n -ut 16 !. ™ atra f s y ie Ws water which has an acid reaction, infusible before the blowpipe. With solution of cobalt becomes olue. .hasily soluble m hydrochloric acid. A1S + pH, sulphuric acid 23-2, alumina 29'8, water 47’0. Analyses of websterite a from Halle, b from Mori near Hallo c from Newhaven all by Stromeyer, from Halle d by Schmidt e by Marchand, f from Lunel-Vieil by Dufrenoy:— ° b c d e f Sulphuric acid . . . 23'37 23'68 23-37 23-26 22 3 23'45 Alumma 30-28 30-98 29-87 29 23 307 2972 Dime __ _ rl8 _ _ Water 43-37 45 . 34 46 . 76 40 . 34 4? . 0 46 . go Is found in reniform masses at Halle, Mori, Schlettau and Langenbogen near Halle, Auteuil near Paris, Lunel-Vieil in the department du G-ard, Newhaven in Sussex. Combinations of ais + 9H with hydrate of alumina in various proportions have been found in the neighbourhood of Halle. 377. G-AENSDOEFITE.—Pissophane; Dufpefioy. Pisso- phan; Hau^mhnn, Haidipggr. y l llf tr Ph T 0US ; F f cture conchoidal. Transparent... trans- wbite r, , *y e vltreous - Green, brown. Streak greyish- An.l,,„bj Erdmann:- 1 HWjd Suphurte^i. .... ^ I Alumina. . 3o 16 36-30 11-90 0-80