The American journal of science and arts . erior diameter of the tusk sockets is 5^ inches. The under jaw weighed, when taken from the earth, 69 length is 2 feet, 6;^ inches ; and the distance from the top of thecondyloid process to the angle of the jaw, is 12| inches ; while thearticulating surface of this process is 5| inches. These bones were found in a bed of fresh-water marl, formed in adepression of a deposit of yellowish clay, which is a continuousdeposit, occupying the western portion of the state. Beneath it, iageological position, occurs a deposit of dark blue clay, restin
The American journal of science and arts . erior diameter of the tusk sockets is 5^ inches. The under jaw weighed, when taken from the earth, 69 length is 2 feet, 6;^ inches ; and the distance from the top of thecondyloid process to the angle of the jaw, is 12| inches ; while thearticulating surface of this process is 5| inches. These bones were found in a bed of fresh-water marl, formed in adepression of a deposit of yellowish clay, which is a continuousdeposit, occupying the western portion of the state. Beneath it, iageological position, occurs a deposit of dark blue clay, resting uncon-formably on the mountain limestone. These deposits are composedof finely divided particles, disposed in nearly horizontal layers, throughwhich are interspersed pebbles of primary and secondary rocks. Thesesuperficial materials often attain a thickness of 150 or 200 feet. The boulders, which are found so abundantly throughout the wes-tern part of Ohio, repose upon these materials, and are, therefore, amore recent formation. Fig. I also send you a drawing of the crown of a molar tooth, (Fig. 2,)belonging to the fossil elephant, exhumed about two years since, in Miscellanies. 191 Jackson County, by Mr. Briggs and myself. A more particular de-scription of these bones is contained in this Journal, Vol. xxxiv, They were found in the blue clay before spoken of, which islower in the geological series than the fresh-water marl. The bones of the Mastodon and elephant have been found in jux:ta-position, at Nashport, in Muskingum County, which establishes thefact, that they existed contemporaneously ; but whether they disap-peared from the face of the earth at the same epoch, is a matter ofdoubt. Yours, truly, J. W. , Ohio, 14tli Feb, 1839. 15. Notice of the use of the fumes of Nitric Acid in Pulmonary diseases.[Extract of a letter to the senior Editor.] Dear Sir—I cheerfully comply with your request, to make a statementof the facts in my possession
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