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KTANITE. 287 on the faces m, above 8'0 on the other faces and on the angles and edges, o = 3 - 58...3-62. Perfectly infusible before the blowpipe. The coloured va rieties become white. With borax melts with difficulty, but completely, into a transparent colourless glass. With salt of phosphorus leaves an opaque skeleton of silica. With a little soda melts partially; with more soda intumesces and becomes infusible. Moistened with solution of cobalt and strongly heated becomes blue. Is not acted upon by acids. AlSi, silica 37'52, alumina 62'48. Analyses of kyanite a, b from St. Gotthardt by Arfvedson, c from St. Gotthardt by ltosales, d from St. Gotthardt, o = 3'6, by Marignac, e from Ebraas by Arfvedson, f from the Tyrol, o = 3-601, by A. Erdmann, g from the Greiner, a = 3-678, by Jacobson.-— a b c d e f g Silica .... 34-33 36-9 36-67 36’60 36’4 37 36 37'30 Alumina . . . 64-89 6f7 63-11 62-66 63-8 62’09 62 60 Eed ox. iron . — — 119 0"84 — 0'7i i"08 In imbedded crystals, in mica slate, talc slate, gneiss, granite, dolomite, marble, witli staurolite, which is frequently attached to or imbedded in tho crystal of kyanite, with the face a, and the edge am, of the staurolite parallel to the face m, and edge mt, of the kyanite; in columnar or fibrous masses; pseudo- morphous after andalusite. Analyses of a brown columnar variety (sillimanite) from Pettypang near Saybrook in Connecticut h by Staaff, i by 11. Silliman, k of a fibrous variety (bucholzite or fibrolite) from Chester in Pennsylvania by A. Erdmann, ^ I from Chester, m from Brandywine Springs, n of Bournon’s fibrolite, all by B. Silliman:— h i k I m n Silica 37-36 37-65 40'08 34'31 36 16 36‘31 Alumina .... 68*62 62*41 68*88 04*43 63*63 62*42 lied oxide of iron . 2-17 — 0"74 — — °'70 Magnesia . . . 0"40 — — 052 Is found in many places on St. Gotthardt, in mica slate, on the Greiner and at Pfitsch in the Tyrol, 011 the Baeher in Styria, on the Sau Alp in Carinthia, Gangerhausel near Petschau in Bohemia ; Bodenmais, llof and Aschairenhurg in Bavaria, in tho mining districts of Saxony, near Sebes in Transyl vania, Langenlois near Krems in Austria, Bernstein in Moravia, the island of Syra, in many places in the Ural, Botriphny in
