Art. X. On a curious substance found with the native Nitre of Kentucky and of Africa, by Samuel Brown, M.D. 146 BOTANY. Art. XI. Description of species of Sponges observed on the shores of Long-Island, by C. S. Rafinesque, Esq. 149 Art. XII. Memoir on the Xanthium maculatum, by the same 151 ZOOLOGY. Art. XIII. Description of the Phalæna Devastator--the Insect that produces the Cut-worm, by Mr. John P. Brace 154 Art. XIV. Description of the Exoglossum, a new genus of Fresh-water Fish, by C. S. Rafinesque, Esq. 155 PHYSICS, MECHANICS, AND CHEMISTRY. Art. XV. On the Revolving Steam-Engine of Mr. Samuel Morey, communicated by John L. Sullivan, Esq. 157 Art. XVI. Cautions regarding Fulminating Powders 168 USEFUL ARTS. Art. XVII.[16] Account of a Parisian method of obtaining Gelatine from bones, by Mr. Isaac Doolittle 170 Art. XVIII. On the use of Distilled Seawater for domestic purposes--from the Annales de Chimie, &c. 172 FINE ARTS. Art. XIX. Essay on Musical Temperament, by Professor Fisher 176 Art. XX. Notice of Col. Trumbull's Picture of the Declaration of Independence 200 INTELLIGENCE. Art. XXI. An Address to the People of the Western Country 203 Art. XXII. Extract of a letter from Col. Gibbs, on the effect of light on the Magnetical power 207 Art. XXIII. On a new Lamp, without flame--from the Annals of Philosophy _ibid._ FOOTNOTES: [16] _ERRATUM._ In the text this Article was, by inadvertence, numbered XIX, and all the succeeding Articles of this Number are marked _two_ higher than they ought to be. THE _AMERICAN_ JOURNAL OF SCIENCE, &c. MINERALOGY AND GEOLOGY. ART. I. _Remarks on the Geology and Mineralogy of a Section of Massachusetts on Connecticut River, with a Part of New-Hampshire and Vermont; by_ EDWARD HITCHCOCK, A. M. _Principal of Deerfield Academy_.