on the Chippewan mountains pour their contents into the Missouri. This flood is scarcely ever less than five, nor more than 20 feet at St. Louis, above the ordinary height of the river. On two occasions, however, since the country was known to the French, it has arisen to that height in the Mississippi as to flow over the American Bottom in Illinois, and drive the inhabitants of Cahokia and Kaskaskia from their villages to the bluffs. Rain in greater or less quantities usually falls during the rise of the river, and ceases when the waters subside. So uniform is this the case in Upper Missouri, the region beyond the boundary of the State, that the seasons are divided into wet and dry.

Pumice stones and other volcanic productions occasionally float down its waters.

Mississippi River. The extreme head of the longest branch of the Mississippi river, has been found in lake Itaska, or Lac la Biche, by Mr. Schoolcraft, who states it to be elevated 1500 feet above the Atlantic ocean, and distant 3,160 miles from the extreme outlet of the river at the gulf of Mexico. The outlet of Itaska lake, which is connected with a string of small lakes, is ten or twelve feet broad, and twelve or fifteen inches deep. This is in latitude about 48° north. From this it passes Cedar and several smaller lakes, and runs a winding course, 700 miles, to the falls of St. Anthony, where its waters are precipitated over a cataract of 16 or 17 feet perpendicular. It then continues a southeastern course to the Missouri, in N. lat, 38° 38', receiving the St. Croix, Chippewa, Wisconsin, Rock and Illinois rivers, with many smaller streams from the east, and the St. Peter's, Iowa, Des Moines, and Salt rivers, besides a number of smaller ones from the west. The current of the Missouri strikes that of the Mississippi at right angles, and throws it upon the eastern shore. When at a low stage, the waters of the two rivers are distinct till they pass St. Louis.

The principal branch of the Upper Mississippi, is the St. Peter's, which rises in the great prairies in the northwest, and enters the parent stream ten miles below the falls of St. Anthony. Towards the sources of this river the quarries exist from which are made the red stone pipes of the Indians. This is sacred ground. Hostile tribes meet here, and part unmolested.

Rock river drains the waters from the northern part of Illinois and Wisconsin, and enters the parent stream at 41° 30' north latitude. In latitude 39° comes in the Illinois, signifying the "River of Men;" and eighteen miles below this, it unites with, and is lost in the Missouri.

Custom has fixed unalterably, the name Mississippi, to this united body of waters, that rolls its turbid waves towards the Mexican gulf; though, as has been intimated, it is but a continuation of the Missouri.

Sixty miles below St. Louis, the Kaskaskia joins it, after a devious course of 400 miles. In 37° north latitude, the Ohio pours in its tribute, called by the early French explorers, "La Belle Rivière," the beautiful river. A little below 34°, the White river enters after a course of more than 1,000 miles. Thirty miles below that, the Arkansas, bringing its tribute from the confines of Mexico, pours in its waters. Above Natchez, the Yazoo from the east, and eighty miles below, the Red river from the west, unite their waters with the Mississippi. Red River takes its rise in the Mexican dominions, and runs a course of more than 2,000 miles.

Hitherto, the waters in the wide regions of the west have been congregating to one point. The "Father of Waters," is now upwards of a mile in width, and several fathoms deep. During its annual floods, it overflows its banks below the mouth of the Ohio, and penetrates the numerous bayous, lakes, and swamps, and especially on its western side. In many places these floods extend thirty or forty miles into the interior. But after it receives the Red river, it begins to throw off its surplus waters, which flow in separate channels to the gulf, and never again unite with the parent stream. Several of these communications are held with the ocean at different and distant points.

Ohio River. The Ohio river is formed by the junction of the Alleghany and Monongahela, at Pittsburg. The Alleghany river rises not far from the head of the western branch of the Susquehannah, in the highlands of McKean county, Pennsylvania. It runs north till it penetrates Cataraugus county, New York, then turns west, then southwest, and finally takes a southern course to Pittsburg. It receives a branch from the Chatauque lake, Chatauque county, New York. The Monongahela rises near the sources of the Kenhawa, in western Virginia, and runs north till it meets the Alleghany.

The general course of the Ohio is southwest. Its current is gentle, and it receives a number of tributaries, which are noticed in the States where they run.

The Valley of the Mississippi has been arranged by Mr. Darby, into four great subdivisions.

1. The Ohio Valley, length 750 miles, and mean width 261; containing 196,000 square miles.

2. Mississippi Valley, above Ohio, including the minor valley of Illinois, but exclusive of Missouri, 650 miles long, and 277 mean width, and containing 180,000 square miles.

3. Lower Valley of the Mississippi, including White, Arkansas, and Red river vallies, 1,000 miles long, and 200 wide, containing 200,000 square miles.

4. Missouri proper, including Osage, Kansau, Platte rivers, &c. 1,200 miles long, and 437 wide, containing 523,000 square miles.

"The Valley of the Ohio is better known than any of the others; has much fertile land, and much that is sterile, or unfit for cultivation, on account of its unevenness. It is divided into two unequal portions, by the Ohio river; leaving on the right or northwest side 80,000, and on the left or southeast side, 116,000 square miles. The eastern part of this valley is hilly, and rapidly acclivous towards the Appalachian mountains. Indeed its high hills, as you approach these mountains, are of a strongly marked mountainous character. Of course the rivers which flow into the Ohio—the Monongahela, Kenhawa, Licking, Sandy, Kentucky, Green, Cumberland, and Tennessee—are rapid, and abounding in cataracts and falls, which, towards their sources, greatly impede navigation. The western side of this Valley is, also, hilly for a considerable distance from the Ohio, but towards its western limit, it subsides to a remarkably level region. So that whilst the eastern line of this Valley lies along the high table land, on which the Appalachian mountains rest, and where the rivers of the eastern section of this Valley rise, which is at least 2,000 miles generally above the ocean level; the western line has not an elevation of much more than half of that amount on the north, and which greatly subsides towards the Kaskaskia. The rivers of the western section are Beaver, Muskingum, Hockhocking, Scioto, Miami, and Wabash. Along the Ohio, on each side, are high hills, often intersected with deep ravines, and sometimes openings of considerable extent, and well known by the appellation of "Ohio hills." Towards the mouth of the Ohio, these hills almost wholly disappear, and extensive level bottoms, covered with heavy forests of oak, sycamore, elm, poplar, and cotton wood, stretch along each side of the river. On the lower section of the river, the water, at the time of the spring floods, often overflows these bottoms to a great extent. This fine Valley embraces considerably more than one half of the whole population of the entire Valley of the West. The western parts of Pennsylvania and Virginia, the entire states of Ohio,