Chapters in this book

1. Frontmatter I
2. Laws of the Society relating to'the Transactions III
3. Officers of the Society for the Year 1843 V
4. List of the Members of the Society elected since the Publication of the Seventh Volume VI
5. Obituary Notice VIII
6. CONTENTS IX
7. ARTICLE I. Contributions to Electricity and Magnetism. By Joseph Henry, LL. D. &c., Professor of Natural Philosophy in the College of New Jersey, Princeton 1
8. ARTICLE II. Description of an entire Head and various other Bones of the Mastodon. By William E. Horner, M. D., and Isaac Hays, M. D. 37
9. ARTICLE III. On the Cecidomyia Destructor, or Hessian Fly. By Miss M. H. Morris 49
10. ARTICLE IV. Remarks on the Dental System of the Mastodon, with an Account of some Lower Jaws in Mr, Koch's Collection, St. Louis, Missouri, where there is a solitary Tusk on the right Side. By William E. Horner, M. D., Professor of Anatomy in the University of Pennsylvania 53
11. ARTICLE V. Observations to determine the Magnetic Intensity at several Places in the United States, with some additional Observations of the Magnetic Dip. By Elias Loomis, Professor of Mathematics and Natural Philosophy in Western Reserve College. Read Nov. 6, 1840 61
12. ARTICLE VI. On the Perchlorate of the Oxide of Ethule or Perchloric Ether. By Clark Hare and Martin H. Boye. Read December 4, 1840 73
13. ARTICLE VII. Observations on the Storm of December 15,1839. By William C. Redjield, A. M. Read January 15, 1841 77
14. ARTICLE VIII On the Purturbations of Meteors approaching near the Earth. By Benjamin Pierce, A. A., Hollis Professor of Mathematics and Natural Philosophy in Harvard University; in a Letter to S. C. Walker, Esq. Read January 15, 1841. 83
15. ARTICLE IX. Researches concerning the Periodical Meteors of August and November. By Sears C. Walker, A. P. S. Read January 15, 1841 87
16. ARTICLE X. Astronomical Observations made at Hudson Observatory, Latitude 41° 14' 40" North, and Longitude 5 h. 25 m. 45 s. West. By Elias Loomis, Professor of Mathematics and Natural Philosophy in Western Reserve College. Read April 2d and 16th, 1841 141
17. ARTICLE XI. Expansion of F (x + h). By Pike Powers, of the University of Virginia. Read April 2, 1841 155
18. ARTICLE XII. Description óf Nero Fresh Water and Land Shells. By Isaac Lea. Read Jan. 15, 1841 163
19. SYSTEMATIC INDEX 250
20. CONTENTS 251
21. CORRIGENDA 252
22. ARTICLE XIII . Description and Notices of new or rare Plants in the natural Orders Lobeliacem, Campanulacece, Vacciniece, Ericacece, collected in a Journey over the Continent of North America, and during a Visit to the Sandwich Islands, and Upper California. By Thomas Nuttall. Read December 3, 1841 253
23. ARTICLE XIV. Observations on the Geobgy of the Western Peninsula of Upper Canada, and the Western Part of Ohio. By William B. Rogers, Prof, of Natural Philosophy in the University of Virginia and Henry D. Rogers, Prof, of Geology in the University of Pennsylvania. Read December 3, 1841 275
24. ARTICLE XV. Observations of the Magnetic Dip in the United States. Fourth Series. By Elias Loomis, Professor of Mathematics and Natural Philosophy in Western Reserve College. Read May 6, 1842 287
25. ARTICLE XVI. Supplementary Observations on the Storm which was experienced throughout the United States about the 20th of December, 1836. By Elias Loomis, Professor of Mathematics and Natural Philosophy in Western Reserve College, Ohio. Read May 6, 1842 307
26. ARTICLE XVII. Astronomical Observations, made at several Places in the United States. By J. N. Nicollet. Read May 6, 1842 309
27. ARTICLE XVIII. Observations ofEncke's Comet, at the High School Observatory, Philadelphia, March and April 1842, with the Fraunhofer Equatorial, by Sears C. Walker, and E. Otis Kendall Read May 20, 1842 313
28. ARTICLE XIX. Observations of the Magnetic Dip, made in the United States, in 1841. By J. N. Nicollet. Read September 16, 1842 317
29. DONATIONS 329