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adjacent to the Medicine Bow Mountains, whose waters are strongly impregnated with mineral salts.

In numerous places the surface, for small distances, is entirely naked and whitened with saline efflorescences, that vie in their appearance with the unspotted purity of fresh-fallen snow.

The Laramie river34 traces its way through the whole extent, —rising in the southern extremity of the Medicine Bow Mountains and in the desolate highlands that form the dividing ridge between its own and the waters of Cache a la Poudre, and, after flowing a distance of some three hundred miles, discharges itself into the Platte.

Upon this river and its branches are many beautiful bottoms of rich alluvial soil, well adapted to cultivation, varying from five to ten miles in length, and from two to five in breadth. These bottoms are to some extent well supplied with timber, consisting of ash, elm, cottonwood, box elder, and willow, while the adjacent mountains and hills afford pine, cedar, and balsam.

Of the various kinds of wild fruits and berries are found cherries, plums, currants, gooseberries, service-berries, buffalo-berries, and some few grapes; among its vegetables and roots are the bread-root, pomme blanc, onions, and commote.

Its prevailing rock is sandstone, (gray micaceous, brown argillaceous, red granitic, and ferruginous,) limestone, (siliceous, testaceous, fossiliferous, and terrene,) and red granite, with various conglomerates and heavy boulders of fragmentary and transition rock.

Among the mineral productions incident to this region are salt, sulphur, soda, magnesia, nitre, alum, coal, iron, copper, and gold, (the latter only in small quantities.) Among its game is embraced nearly every variety found in countries adjacent to the mountains.

The high prairies skirting the tributaries of the Laramie, though favored with many valleys of fertile soil, are fit only for grazing purposes, on account of their general aridity and scarcity of water; a fault, by the way, too common with a large proportion of that vast extent of territory from the neighborhood of our western frontiers almost to the very shores of the Pacific.

34 This river received its present name from one Joseph Laramie, a French trapper, who was killed near its mouth, several years since, by the Indians.