OXIDES, AND ACIDS. b C d e 0'12 1-18 0-47 — 0-19 — 30'90 30'25 30-39 30-42 270 Protoxide of iron . . — Lime Water 30 Analyses of the fibrous variety (nemalite) f by Connell, g by Whitney, h, i by Wurtz, h by Bammelsberg:— Magnesia . . Protoxide of iron Water . . . Carbonic acid . Silica .... According to G. Pose it contains carbonic acid (perhap., derived from the atmosphere), and transparent fragments of the mineral are dissolved with effervescence in hydrochloric acid. Is found in crystals, and columnar, scaly or granular and fibrous masses, in fissures in serpentine at Hoboken in New Jersey, Staten Island in New York, Swinaness in Unst, near Portsoy in Scotland, Pyschminsk not far from Beresowsk in Siberia. / 9 h i h 57-86 62-89 66 05 66-11 04-80 2-84 4-64 5-03 5'72 4*05 27-96 28-30 3013 undet. 29*48 10-00 4-10 — — — 0-80 — — — 0*27 IS 144. YOLKNEEITE.—Volknerit; Hermann. In six-sided prisms. Lustre pearly. White. Unctuous to the touch, g = 2'04. In the matrass yields- water. Exfoliates and shines brightly before the blowpipe, but does not melt. Soluble in acids with evolution of carbonic acid. Analysis by Hermann:— Alumina lyes Magnesia 38 69 Water 4370 Exclusive of 3'92 per cent, of carbonic acid, supposed to bo derived from the atmosphere. Is found at Sehischimskaja Gora in the Ural. According to Hermann, hydrotalcite, a mineral found in the steatite of Snarum, was originally identical with volknerite. It is cleavable in one direction; translucent, pearly, white in clining to yellow; and according to the analysis by Ilochstetter consists of:—carbonic acid 10'Sl, alumina 12'00, red oxido of iron 6'90, magnesia 38'30, water 32'88, insoluble matter 1'20.
