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 and which afford each a different aspect, both by the nature of the country, and by the productions that grow there.

West Tennessea comprises two-thirds of this state. The greater part of it reposes upon a bank of chalky substance of the same nature, the beds of which are horizontal. The stratum of vegetable earth with which it is covered appears generally not so thick as in Kentucky, and participates less of the clayey nature. It is usually, in point of colour, of {233} a dark brown, without the least mixture of stony substances. The forests that cover the country clearly indicate how favourable the soil is for vegetation, as most of the trees acquire a very large diameter. Iron mines are also as scarce there as in Kentucky; and provided any new ones were discovered, they would have been worked immediately, since the iron that is imported from Pennsylvania is at such an enormous price.

The secondary rivers which in this part of Tennessea run into Cumberland are almost completely dry during the summer; and it is probable enough, that when the population grows more numerous, and the plantations are formed farther from their banks, the want of water will be more severely felt in this part than in Kentucky. There are, notwithstanding, several large rivulets or creeks that issue from excavations that are found at the foot of the mountains, in different parts of the country: at the same time it has been remarked that these kind of sources never fail, although the water is not so deep in summer. {234} Just at the mouth of these subterraneous passages they are sometimes accompanied with a current of air strong enough to extinguish a light. I observed this particularly myself at the spring of the rivulet called Dixon's Spring, and of another situated about four miles from Nasheville.