Page:Notes on the State of Virginia (1853).djvu/36

20 A substance supposed to be Pumice, found floating on the Missisipi, has induced a conjecture, that there is a volcano on some of its waters; and as these are mostly known to their sources, except the Missouri, our expectations of verifying the conjecture would of course be led to the mountains which divide the waters of the Mexican Gulf from those of the South Sea; but no volcano having ever yet been known at such a distance from the sea, we must rather suppose that this floating substance has been erroneously deemed Pumice. 



ITS CASCADES AND CAVERNS?

The only remarkable cascade in this country, is that of the Falling Spring in Augusta. It is a water of James River, where it is called Jackson's River, rising in the Warm Spring mountains, about 20 miles Southwest of the Warm Spring, and flowing from that valley. About three quarters of a mile from its source, it falls over a rock 200 feet into the valley below. The sheet of water is broken in its breadth by the rock in two or three places, but not at all in its height. Between the sheet