The _Valley of the Hudson_ varies extremely in its width, being in some places contracted to the immediate neighborhood of the stream; in others extending forty miles. On the borders of the river the land is generally elevated. The _Mohawk_ is bordered by two long ranges of hills presenting little variety of aspect. In the early part of its course it flows through extensive flats. The valleys of the Susquehanna and its branches are remarkably irregular. These streams traverse the whole width of the Apalachian chain of mountains, sometimes flowing in wide valleys between parallel ranges for fifty or sixty miles in a direct course, and at other times breaking through the mountain ridges. The valleys between the different ranges of the great chain extending throughout Pennsylvania are often twenty or thirty miles in width with a hilly or broken surface. Illustration: Valley of the Mohawk. The only large valley in North Carolina lies between the Blue Ridge, and a parallel range called the Iron, Bald, and Smoky Mountains. It runs north-east and south-west, is one hundred and eighty miles in length, and from ten to forty in width. The valleys of the small rivers of Tennessee are singularly beautiful and fertile, surpassing all others of the same description in the Western States. The valleys of the Cumberland and Tennessee differ little from the alluvions of the other great rivers of the west. The _Valley of the Connecticut_ is one of the most celebrated valleys of the United States for its fertility and beauty. It is a large tract of land extending from Long Island sound to Hereford Mountains in Canada, five miles beyond the forty-fifth degree of latitude. In the largest sense, it is from five to forty-five miles in width, and its surface is composed of a succession of hills, valleys and plains. The interval lands begin about twelve or fourteen miles from the mouth of the river. These are formed by a long and continued alluvion. The tributary streams of the Connecticut run every where through a soft and rich soil, considerable quantities of which, particularly the lighter and finer particles, are from time to time washed into their channels, by occasional currents springing from rains and melted snows. Wherever the stream moves with an uniform current these particles are carried along with it; but where the current is materially checked, they are in greater or less quantities deposited. In this manner a shoal is formed at first, which afterwards rises into dry land; this is almost invariably of good quality, but those parts which are lowest are commonly the best, as being the most frequently overflowed, and therefore most enriched by successive deposits of slime. Of these parts, that division which is farthest down the river is the most productive, consisting of finer particles, and being more plentifully covered with this manure. In the spring these grounds are almost annually overflowed.