Art. XVI. Analysis of the Harrodsburg Salts, by Edward D. Smith, M. D. Professor of Chemistry and Mineralogy in the South-Carolina College 403 Art. XVII. Additional Notice of the Tungsten and Tellurium, mentioned in our last Number 405 Art. XVIII. A Substitute for Woulfe's or Nooth's Apparatus, by Robert Hare, M. D. Professor of Chemistry in the Medical Department of the University of Pennsylvania, and Member of various Learned and Scientific Societies 410 Art. XIX. A New Theory of Galvanism, supported by some Experiments and Observations made by means of the Calorimotor, a new Galvanic Instrument. Read before the Academy of Natural Sciences, Philadelphia, by Robert Hare, M. D. Professor of Chemistry in the Medical Department of the University of Pennsylvania, and Member of various Learned Societies 413 MATHEMATICS. Art. XX. An improved Method of obtaining the Formulæ for the Sines and Cosines of the Sum and Difference of two Arcs, by Professor Strong, of Hamilton College, &c. 424 MISCELLANEOUS. Art. XXI. An Account of several Ancient Mounds, and of two Caves, in East Tennessee, by Mr. John Henry Kain, of Knoxville 428 Art. XXII. Facts illustrative of the Powers and Operations of the Human Mind in a Diseased State 431 INTELLIGENCE. Art. XXIII. 1. Discovery of American Cinnabar and Native Lead 433 2. Theoretical Views of Professor Hare of Philadelphia 434 3. New Work on Chemistry _ibid._ 4. Botanical 435 5. Staurotide _ibid._ 6. Supplement to the "Remarks on the Geology and Mineralogy of a Section of Massachusetts, on Connecticut River, &c." contained in No. 2, Art. I, of this Journal, by E. Hitchcock, A. M. 436 7. New Process for Tanning 439 8. Connexion between Chemistry and Medicine _ibid._ 9. Brucite _ibid._ 10. Lithography _ibid._ Conclusion 440 _Postscript._--American Geological Society 442 Index 443 THE _AMERICAN_ JOURNAL OF SCIENCE, &c. _GEOLOGY, TOPOGRAPHY, AND MINERALOGY._ ART. I. _On the Geology, Mineralogy, Scenery, and Curiosities of Parts of Virginia, Tennessee, and of the Alabama and Mississippi Territories, &c. with Miscellaneous Remarks, &c. In a Letter to the Editor._ By the REV. ELIAS CORNELIUS.