228 native metals and SPATHOSE IRON. Carbonate of Iron. Brown Spar.* Bracbytypous Parachrose Baryte, M. Spath-Eisenstein, W. Fer Oxyde Carbonatb, H. Fer Spathique, Br. Combination of carbonic acid, and protoxide of iron, of which occasionally a small portion is replaced by protoxide of mangan ese, magnesia, and lime. Baigony, lamellar. 53-0 41-0 0-6 0-0 5-4 Berthier. Sphcerosiderile. 63-75 34-00 0-75 0-00 0-52 Hartz. 57-50 36-00 3-30 1-25 0-00 Klaproth. Klaproth. England, six-sided prisms, Protoxide of iron 59-97 Carbonic acid 38-72 Oxide of mangan. 0-39 Lime 0-92 Magnesia 0-00 Beudant. Sp. Gr. 3-6—3-8. II. = 3-5—4 : 5. Colour various shades of yellow, passing on exposure into brown, and brownish-black ; transparent, translucent, or opake. Occurs in obtuse rhomboids (whose faces are occasionally curvilinear) ; in acute rhomboids, sometimes perfect, or having the terminal angles replaced; in six-sided prisms; in octahedrons; and in len ticular crystals; also striated and massive. Externally it is shining. Structure lamellar, with a brilliant or pearly lustre; yields readily to cleavage parallel to all the planes of an ob tuse rhomboid of 107° and 73°. Affects the magnetic needle. Before the blowpipe blackens and becomes more magnetic, but does not melt; colours borax bottle-green in the reducing flame, and yellow in the oxidating ; and is with difficulty soluble in acids, unless previously reduced to powder. Pon P' 107° 00' P or P' on P" 73 00 Por I" on g (fig. 2) 122 50 g on g’ (fig. 2) 67 20 P or P' on a (fig. 3) 140” 00' e. g. g on a (fig. 3) 165 00 aong or g-on e) (fig. 4) j *♦* Spathose iron, from its presenting rather a sparry than a meta substance; brown spar, from its prevailing colour.