Volltext Seite (XML)
APPENDIX. 403 the strongest heat of the blowpipe it only melts upon the edges, where it becomes greenish-yellow. Treated with soda or borax in the reducing flame, it dissolves with effervescence into a light- yellowish opake mass. Dissolved in salt of phosphorus, the glob- ule is yellow while warm, but on cooling becomes yellowish- green and opake. From these and other experiments, it has been inferred that monazite is a compound of the oxide of ura nium, with some one or more of the earths. It is found in the mountains about Ilmensee in Siberia ; and has been described also under the name of Mengite. MONTICELLITE.—Brooke. H. = 5-0—6-0. In small imbedded crystals, having the general aspect of quartz. Colour yellowish ; sometimes nearly transparent, and colourless. Occurs at Vesuvius imbedded in a crystalline carbonate of lime, along with particles of black mica and minute crystals of Pyroxene. Its name was proposed by Brooke, in honour of the celebrated Neapolitan mineralogist Monticelli. MYSORINE.—Beudanl. Contains deutoxide of copper 6075, peroxide of iion 19 50, carbonic acid 16-70, silica 2-10—Thomson. Sp. Gr. 2-62. . . Occurs massive, having an impalpable composition. ten Pure its colour is brownish-black, but it is frequently tinge green and rod from admixture with; carbonate of copper and oxule ot ’ton. Fracture small conchoidal. Is soluble in acu s w len pure, b ”t if m i xe d with foreign matter the solution deposits a redpre- C'pitate. This rare substance was noticed by Dr Heyne, nea th e eastern frontier of Mysore in Hindustan, where it is men tioned as forming beds in the older rocks. NEOCTESE.*—Beudant. Hydrated arseniate of iron. ^Contains arsenic acid 50-78, peroxide of iron 4 , wa er l>>-55—Berzelius. , , . ... „„„,i . This substance occurs crystallized, though in lll-pronou individuals, its primary form is supposed to be a rig lit squa Ptism. i ts co i our is green) i )ut when heated it gives oft its mois ture and becomes yellow. To the fluxes it imparts the colour iron, emitting at the same time a powerful alliaceous ° ou ■ It occurs at St Antonio Ferreira, near Villa Kicca, m ■ » * From >!<(, new, and trnnt, acquiiUivn.