Daily National Intelligencer

Geology.
—Extract of a letter from Caleb Atwater, Esq. to the Editors, dated Circleville, (O.) June 10.

"I have sixteen drawings of impressions of tropical and other plants, found at Zanesville, in digging the canal. Among these may be seen the leaf of the cocoa nut; bearing-palm leaf, twenty inches in length; the roots, trunk, limbs, and leaves of the bamboo; the trunks, limbs, leaves, and even blossoms of the cassia. The leaves even of the blossoms are fresh, uninjured, and entire, shewing very conclusively that they grew near the spot where they are now found. But what changes must have taken place in our climate, since the cassia flourished here! Has the earth changed its axis and its poles? or has an accumulation of ice within the polar circles produced a change in our once mild climate? With Newton I agree it is unphilosophical to account for any phenomenon in nature, and produce the effect. If this climate has been growing colder during three centuries in the same ratio that it has within the last thirty years, we need not look further for a cause, than the greater prevalence of that current of air rushing across our inland seas, Erie, Michigan, Huron, Superior, &c. from the regions of perennial frost. My drawings were done by Mr. Wm. A. Adams, a young man of much promise, of Zanesville, and they were accompanied by a detailed account of them, by Ebenezer Granger, Esq."

—Weekly Recorder.