[ IOO ] CLASS IV. metallic fossils. O give a minute detail of the phyfical and che/ mical characters of this clafs of minerals, would be improper in a work of this kind, whofe principal objedt is to make us acquainted with the external afpedt of fimple minerals. I refer thofe who wifti for particular and accurate infor mation on this fubjedt, to Thomson’s excellent “ Syftem of Chemiftry.” Platina auram album, Wall. t. 2. p. 365—Platine, iW it Lilt, t. 3. p. 487.—Id. de Born, t. 2. p. 479.— Platin, Wen ner, Pabft. 1. b. f. 31—Id. Wid. f. 661 Id. K\r<u>. vol. »' p. 109—Id. Emm. 2. b. f. 106.—Id. Lam. t. 1. p. 96. Plating natif, Broch. t. 2. p. 86. — Platine natif ferriferer t. 3. p. 368.—Platin, Re tip, 3. b. f. 234. Colour very light fteel-grcy, which approaches to lilver-white. I. PLATINA GENUS. FfRST SPECIES. Native Platina. Gediegen Platin.—Werner. External CharaSlers. Occur*