No. VI. Observations on the Trap Rocks of the Connewago Hills near Middletown, Dauphin County, and of the Stony Ridge near Carlisle, Cumberland County, Pennsylvania

Chapters in this book

1. Frontmatter I
2. ADVERTISEMENT IV
3. LIST OF THE OFFICERS V
4. LIST OF MEMBERS VI
5. OBITUARY NOTICE IX
6. CONTENTS XIII
7. No. I. Descriptions of Insects of the Families of Carabici and Hydrocanthari of Latreille, inhabiting North America 1
8. No. II. Description and Chemical Analysis of the Retinasphalt, discovered at Cape Sable, Magothy River, Ann Arundel County, Maryland 110
9. No. III. Analyses of the Chrysoberyls of Haddam and Brazil 116
10. No. IV. Geological Account of the Valley of the Ohio : in a Letter from Daniel Drake, M.D. to Joseph Correa de Serra 124
11. No. V. Tables of Observations on the Winds, the Currents, the Gulph Stream, the Comparative Temperature of the Air and Water, &c. made on the North Atlantic Ocean, during Twenty-six Voyages to and from Europe, (principally between Philadelphia and Liverpool,) between the years 1799 and 1817, inclusive 140
12. No. VI. Observations on the Trap Rocks of the Connewago Hills near Middletown, Dauphin County, and of the Stony Ridge near Carlisle, Cumberland County, Pennsylvania 156
13. No. VII. An Account of two North American Species of Cyperus, discovered in the State of Georgia: and of four Species of Kyllingia, found on the Brazilian coast, and on the Rio de la Plata in South America 167
14. No. VIII. Catalogue of Plants collected during a Journey to and from the Rocky Mountains, during the summer of 1820. By E. P. James, attached to the Exploring Expedition commanded by Major S. H. Long, of the United States Engineers; by whom it was communicated to the Society, with the permission of the Hon. J. C. Calhoun, Secretary of War 172
15. No. IX. Remarks on the Sandstone and Float? Trap Formations of the Western Part of the Valley of the Mississippi. By E. P. James, attached to the Exploring Expedition commanded by Major S. H. Long, of the United States Engineers; by whom it was communicated to the Society, with the permission of the Hon. J. C. Calhoun, Secretary of War 191
16. No. X. Some Observations on the Anatomy and Physiology of the Alligator of North America. Lacerta Alligator, Gmel. Crocodilus Lucius, Cuvier. Communicated to the American Philosophical Society 216
17. No. XI. Analysis of the Hydraulic Lime used in constructing the Erie Canàl in the State of New York 229
18. No. XII. Papers on Various Subjects connected with the Survey of the Coast of the United States 232
19. No. XIII. Mémoire pour accompagner le Tableau des Observations Météorologiques faites à Washington, depuis le 17 Avril 1823 jusqu'au 18 Avril 1824. Par Jules de Wallenstein, Membre Correspondant de l'Académie d'Histoire de Madrid 421
20. No. XIV. On the Language, Manners, and Customs of the Berbers, or Brebers, of Africa. Communicated by William Shaler, Consul of the United States at Algiers, in a Series of Letters to Peter S. Du Ponceau, and by the latter to the Society 438
21. No. XV. Solution of a General Case of the Simple Pendulum 466
22. No. XVI. Notice of a New Crystalline Form of the Yenite of Rhode Island 478
23. DONATIONS 481
24. ERRATA 504