. The American encyclopædia of commerce, manufactures, commercial law, and finance. tively as the North, the Middle, theSouth, and the San Luis; the last is by far thefinest of the four. They stretch almost in a linefrom the S. to the N. boundary of the State, juston the W. side of the Front Range, and occupyan average breadth of 50 m. The San Luis Parkis, as it were, an inniiense elliptical bowl, withan area of 9,400 sq. ni., bounded E. by the WestMountains and the Sangre de Cristo range, amiW. by the Sierra de San Juan, which is part ofthe great Sierra Miembres. Its surface is nearlyas flat

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. The American encyclopædia of commerce, manufactures, commercial law, and finance. tively as the North, the Middle, theSouth, and the San Luis; the last is by far thefinest of the four. They stretch almost in a linefrom the S. to the N. boundary of the State, juston the W. side of the Front Range, and occupyan average breadth of 50 m. The San Luis Parkis, as it were, an inniiense elliptical bowl, withan area of 9, 400 sq. ni., bounded E. by the WestMountains and the Sangre de Cristo range, amiW. by the Sierra de San Juan, which is part ofthe great Sierra Miembres. Its surface is nearlyas flat as a lake. Tlie centre of the N. part, whichbears the distinctive title of the Rincon, is occu-pied by a considerable sheet of water, fed by 19mountain streams, and accustomed in the winterto overflow a large stretch of the neighboring sa-vanna. The river which gives its name to theSlate belongs to it only by some of its most im-portant tributaries, of which it is sufficient to men-tion the Bear River, and the Gunnison and GrandRiver, which unite before they puss into the Terri-. tory of Utah. Of the rivers of the Atlantic ver-sant, the most important are the South Plate, theArkansas, and the Rio (Jrande del Norte. C. ispreeminently a mineral district, and to this fact itowes its colonization. It possesses extensive de-posits of gold and silver ore. and between theyears 18.59 and 1878 it furni.shod to the U. SlatesMint i?29, 984, 158.59 worth of the former metaland 815, 846, 879.20 of the latter. Iron is prettywidely diffused, and zinc and copper occur inmany of the mines. Coal is also found e.ten-sively on both sides of the main range of moun-tains; the area occupied by the Tertiary depositsbeing no less than 7, 200 sq. m. The mining dis-tricts are five in number, and are distinguished asthe district of the northern mines, the mines of theeastern base, the Conejos County mines, the south-ern mines, and the mines of Summit County. AtMurphys mine, about twelve miles from Denver, the