The Editor will not hold himself responsible for the sentiments and opinions advanced by his correspondents: he will consider it as an allowed liberty to make slight _verbal alterations_, where errors may be presumed to have arisen from inadvertency. CONTENTS. Page INTRODUCTORY Remarks 1 Art. I. Essay on Musical Temperament, by Professor Alex. M. Fisher 9 MINERALOGY AND GEOLOGY. Art. II. Review of Cleaveland's Mineralogy 35 Art. III. New Locality of Fluor Spar, &c. 52 Art. IV. Carbonat of Magnesia, &c. discovered by J. Pierce, Esq. 54 Art. V. Native Copper, near New-Haven 55 Art. VI. Petrified Wood from Antigua 56 Art. VII. American Porcelain Clays, &c. 57 Art. VIII. Native Sulphur from Java 58 Art. IX. Productions of Wier's Cave, in Virginia 59 Art. X. Mineralogy and Geology of part of Virginia and Tennessee, by Mr. J. H. Kain 60 Art. XI. Notice of Professor Mitchill's edition of Cuvier's Geology 68 Art. XII. Notice of Eaton's Index to the Geology of the Northern States, &c. 69 Art. XIII. Notice of M. Brongniart on Organized Remains 71 BOTANY. Art. XIV. Observations on a species of Limosella, by Professor E. Ives 74 Art. XV. Notice of Professor Bigelow's Memoir on the Floral Calendar of the United States, &c. 76 Art. XVI. Journal of the Progress of Vegetation, &c. by C. S. Rafinesque, Esq. 77 ZOOLOGY. Art. XVII. Description of a new Species of Marten, by C. S. Rafinesque, Esq. 82 Art. XVIII. Natural History of the Copper-Head Snake, by the same 84 PHYSICS AND CHEMISTRY. Art. XIX. On a Method of augmenting the Force of Gunpowder, by Colonel G. Gibbs 87 Art. XX. On the connexion between Magnetism and Light, by the same 89 Art. XXI. On a new means of Producing Heat and Light, by J. L. Sullivan, Esq. 91 Art. XXII. On the Effects of the Earthquakes of 1811, 1812, on the Wells in Columbia, South Carolina, by Professor Edward D. Smith 93 Art. XXIII. On the Respiration of Oxygen Gas in an Affection of the Thorax 95 MISCELLANEOUS.