446 TRANS. ST. LOUIS ACAD. SCIENCE. 



Hematitk car. Specular Iron Ore. 



At Iron Mountain, St. FraH<^ois Co , massive, steel-gray to dark gray, 

 semi-crjstalline to coarse crystalline, submetallic to metallic lustre. 

 Always more or less magnetic, showing polar magnetism, containing 

 2 to 5 per cent, of protoxyd of iron ; with 65-68 per cent, of metallic 

 iron. At Pilot Knob, Iron Co., massive, steel-gray with a strong 

 tinge of sky-blue; lustre silky to submetallic; fracture subconchoidal ; 

 not magnetic. The best ore contains 5-13 per cent, of Silica, which 

 percentage increases in the inferior grades of the ore. Also forming 

 a conglomerate by cementing crystals and pieces of transparent 

 Q^iartz. 

 At Scotia Banks, Crawford Co., in small, highly splendent crystals, 

 covering the walls of drusy cavities in the Specular Ore. They are 

 often tarnished, displaying all the colors of the rainbow. Also in re- 

 ticulated forms, enclosing transparent Quartz and dark yellow Jasper. 



At Simmons Mountain, Dent Co.., crystals (flat rhombodedrons) seated 

 on Quartz in drusy cavities of the Specular Ore. 



At Smith Bank, Phelps Co.. in hollow stalactitic forms, covered with 

 splendent crystals. 

 Hematite rar. Red Hematite. 



In Callaway Co.— At Knighfs Bank, massive, of light red color, hard- 

 ness = 6, associated with Siderite. At Xew Bloomfield , bluish-gray 

 or dark red, often thinly stratified, and enclosing fossils. At Hender- 

 son Bank, an oolithic variety. 



In many localities, principally in Franklin Co., Phelps Co., Crazvford 

 Co.. and Dent Co., mostly in soft (H ^ 2-3) earthy masses, some- 

 times with silky lustre, often greasy to the touch; also in botryoidal 

 forms. 

 GOETIIITE. 



At Scotia Banks, Crawford Co., in thin long crystals, on crystals of 

 Amethyst, partially enclosed in the latter. 



In Adair Co., in small crystals on Calcite crystals. Rare. 

 LlMONITE. 



In numerous deposits in the south-eastern and central parts of the State, 

 very often with stalactitic structure. In some places, f.i. at Moselle, 

 Franklin Co., as so-called "kidney-ore." These "kidneys" are rounded 

 forms, sometimes several inches in diameter, hollow inside, the shell 

 being of hard dark brown Limonite, up to 5 of an inch thick, covered 

 by yellow ochre. 

 Side KITE. 



In Phelps Co., at Meramec Bank, and near Rolla, in specks and seams 

 in Red Hematite, and in ferruginous limestone. 



In Callaway Co., at KnighVs Bank, in considerable quantity, with Red 

 Hematite. 



In the Coal-measures of the State, especially in Carroll Co., Johnson 

 Co., Henry Co., Vernon Co., and Barton Co., as Clay Iron Ore, of 



