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native metals, &c. 209 as having been seen to fall from the atmosphere is that of Hras- china, near Agram in Croatia. I he mass found in Siberia by i rofessor Pallas exhibited a vesicular structure, and contained crystals and grains of chrysolite; that discovered by Don Rubin de Celis, in the district of Chaco-Gualamba in South America, weighed about fifteen tons. America, Many masses are scattered over the continent of North Ame rica, as in Louisiana, and still farther north in the countries in habited by the Esquimaux; several specimens also occur in Africa, as in the Senegal river, and near the Cape of Good Hope. With the exception of the Siberian variety mentioned by Pallas, and a mass lately noticed in the Atacama desert of Peru, both or which had a vesicular appearance and contained straw-yellow coloured olivine, native irons have uniformly presented a solid structure. Iron has also been found entering into the composition of those ony masses termed meteoric stones or aerolites, which have been en to fall from the atmosphere in various parts of the world, n -r ! n our own country. These, however, may with more disHnrt y • u P on as mixed minerals or rocks, than as iitujN PYRITES.* Schwefelkies, W. F er Sulphure, II. Bt. Ilexahedral Iron Pyrites, M 1 ynte Martiale, Br. t_ . Combination of iron and sulphur, iron 4.7.85 45 . 74 ; Sulphur 52-15—Hatchett. 54-26—Berzelius. Col I P ' 4 ' 75 t0 5 ' 0, H - = 6-0—6-5. -^ r n rass_ yellow, sometimes approaching to bronze-yellow bistro 3 .^11 steel '£ re y > often brown, owing to decomposition 5 strea ^ brownish- or greenish-black. It occurs and cn ina ,' ln roc ^ s > ve ins, and beds, investing other minerals irlobnl-!^ e enc i° set i in them; also amorphous, mamillated crvstili;? ‘T- ' ? r ’ sta ' actit ical, pseudomorphous, capillary, ant to y them hi, 1 " lhe ° ube and octahedron, and in forms commor to all the 88 i’” rT J ar y crystals. It yields to cleavage paralle Surfhce sSe" eS r°/ U le „ cube and re gnlar octahedron, affording meter but b r »Hiant for the use of the reflective gonio- of the e, l, .' ■! f C S reate t st ease and brilliancy parallel to thost nr I - 1 e ’ fracture is granular or uneven, sometimes ap knif '"i^ C0ncdl0Ic ial! it is brittle, but does not yield to the e, w nch serves at once to distinguish it from copper pyrites I) rites, from the Greek, in allusion to its giving sparks when struck,