and man," and I would add, between state and state. Has the heat of these waters any connection with volcanic phenomena? Or is the temperature entirely chemical, originating in the decomposition of sulphuret of iron, as I suggested some years ago in a paper published upon the subject? At the Hot Springs, the hot sulphur water and the cold pure water, issue out of the calcareous rock at the base of the Warm Spring mountain, within a few feet of each other. One of these Virginia Springs, makes a copious deposite of calcareous tufa; and at another, you perceive newly formed crystals of sulphate of iron. The White Sulphur Spring takes its name from a rich white deposite, and the Red Sulphur from one of that color. If this is not an uncommon and a highly interesting section of country, calling aloud for investigation, and meriting legislative interference, then have I taken an entirely erroneous view of the subject. The Warm Spring mountain is white sandstone. The rocks of the valley of the Hot Springs are calcareous, argillaceous and silecious; they are all nearly vertical. At first the two former, and afterwards the two latter, alternate. They have all been deposited in a horizontal position, and between their narrow strata are thin layers of clay covering organic remains.--Those of the lime and slate are principally zoophytes. That of the silecious is the fossil described by Doctor R. Harlan, from a specimen obtained by me in the western part of the state of New York. He supposed it to be a now extinct vegetable fossil of the family fucoides, and he has called it _Fucoide Brongniard_,--in honor of M. Brongniard. But I suppose it to be _animal_, and to belong to the family of the Encrinites.[1] [Footnote 1: See an essay of Richard C. Taylor, F. G. S. on the geological position of certain beds which contain numerous fossil marine plants of the family fucoides; near Lewistown, Mifflin county, Pennsylvania, in vol. I. part I. of the Transactions of the Geological Society of Pennsylvania, page 1.] The mountain ranges of Virginia are more numerous, and the valleys consequently narrower, than they are in Pennsylvania; but some of them are very interesting. The great valley, as it is sometimes called, or par excellence, _the valley_, situate between the Blue Ridge and the North and Alleghany Mountain, is by far the most extensive. The rocks often obtrude, rendering the soil rather scanty, but nevertheless this is a fine district of country. I could find no fossils in this rock. In regard to the metallic ores, I would observe, that I discovered sufficient indications of their existing in Virginia in quantity sufficient to justify a more accurate examination. Iron abounds in almost every part of the western section of the state. Traces of copper, lead, manganese and chrome, have also been discovered near the Blue Ridge; and the gold of Orange County is equal to any found in the Carolinas or Georgia.