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Show 110 Early Western Travels [ VoL * 6 Above the embouchure of the Missouri, fifteen hundred miles from the Mexican gulf, it is broader than at New- Orleans, with scarce one tenth of its waters; and at the foot of St. Anthony's Falls its breadth is but one third less. This forms a striking characteristic of the Western rivers, and owes, perhaps, its origin partially to the turbid character of their waters: as they approach their outlet they augment in volume, and depth, and impetuosity of current, but contract their expanse. None, however, exhibit these features so strikingly as the grand central stream; and while, for its body of water, it is the narrowest stream known, it is charged with heavier solutions and has broader alluvions than any other. The depth of the stream is constantly varying. At New- Orleans it exceeds one hundred feet. Its width is from half of one mile to two miles; the breadth of its valley [ 81] from six miles to sixty; the rapidity of its current from two miles to four; its mean descent six inches in a mile, and its annual floods vary from twelve feet to sixty, commencing in March and ending in May. Thus much for Statistics. Below its confluence with its turbid tributary, the Mississippi, as has been observed, is no^ longer the clear, pure, limpid stream, gushing forth from the wreathy snows of the Northwest; but it whirls along against its ragged banks a resistless volume of heavy, sweeping floods, and its aspect of placid magnificence is beheld no more. The turbid torrent heaves onward, wavering from side to side like a living creature, as if to overleap its bounds; rolling along in a deep-cut race- path, through a vast expanse of lowland meadow, from whose exhaustless mould are reared aloft those enormous shafts shrouded in the fresh emerald of their tasselled parasites, for which its alluvial bottoms are so famous. And beneath its depths, as evinced by the great earthquakes of 1811, demonstrates that, for centuries, the Mississippi has occupied its present bed.- FLAOG. |