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Stated Meeting, January 1, 1869
Vol 11, Iss 81, Page 1, Date 1869
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Stated Meeting, January 15, 1869
Vol 11, Iss 81, Page 3, Date 1869
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Stated Meeting, February 5, 1869
Vol 11, Iss 81, Page 8, Date 1869
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Stated Meeting, February 19, 1869
Vol 11, Iss 81, Page 14, Date 1869
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Philadelphia Life Tables
Vol 11, Iss 81, Page 17, Date 1869
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Stated Meeting, March 5, 1869
Vol 11, Iss 81, Page 23, Date 1869
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Notes on the Geology of Wyoming and Colorado Territories. No. 2
Vol 11, Iss 81, Page 25, Date 1869
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Stated Meeting, March 19, 1869
Vol 11, Iss 81, Page 83, Date 1869
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Obituary Notice of Mr. Bancker
Vol 11, Iss 81, Page 85, Date 1869
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Stated Meeting, April 2, 1869
Vol 11, Iss 81, Page 90, Date 1869
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On the Periodicity of the Solar Spots
Vol 11, Iss 81, Page 94, Date 1869
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Cosmical Relations of Light to Gravity
Vol 11, Iss 81, Page 103, Date 1869
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Boring Records from the Anthracite Basin
Vol 11, Iss 81, Page 107, Date 1869
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Stated Meeting, April 16, 1869
Vol 11, Iss 81, Page 110, Date 1869
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Stated Meeting, May 7, 1869
Vol 11, Iss 81, Page 112, Date 1869
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Stated Meeting, May 21, 1869
Vol 11, Iss 81, Page 114, Date 1869
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Stated Meeting, June 18, 1869
Vol 11, Iss 81, Page 116, Date 1869
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Prodromus of a Study of the Fresh Water Algae of Eastern North America
Vol 11, Iss 81, Page 119, Date 1869
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Stated Meeting, July 16, 1869
Vol 11, Iss 81, Page 145, Date 1869
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Seventh Contribution to the Herpetology of Tropical America
Vol 11, Iss 81, Page 147, Date 1869
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Stated Meeting, August 20, 1869
Vol 11, Iss 81, Page 192, Date 1869
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Stated Meeting, Sept. 17, 1869
Vol 11, Iss 81, Page 193, Date 1869
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Some Suggestions on the Maintaining Forces of Cosmical Motion
Vol 11, Iss 81, Page 195, Date 1869
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Tidal Rainfall
Vol 11, Iss 81, Page 202, Date 1869
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An Abstract of Some of the Results of Measurements and Examinations of the Photographs of the Total Solar Eclipse of August 7, 1869
Vol 11, Iss 81, Page 204, Date 1869
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Stated Meeting, Oct. 15, 1869
Vol 11, Iss 81, Page 209, Date 1869
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Stated Meeting, Nov. 5, 1869
Vol 11, Iss 81, Page 211, Date 1869
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Stated Meeting, Nov. 19th, 1869
Vol 11, Iss 81, Page 213, Date 1869
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On Comets and Meteors
Vol 11, Iss 81, Page 215, Date 1869
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A Search for a Normal Cause of the Recession of Cosmical Nodes
Vol 11, Iss 81, Page 220, Date 1869
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On the Medical Activity of the Hemp Plant, as Grown in North America
Vol 11, Iss 81, Page 226, Date 1869
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Stated Meeting, Dec. 3d, 1869
Vol 11, Iss 81, Page 233, Date 1869
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Stated Meeting, Dec. 17th, 1869
Vol 11, Iss 81, Page 234, Date 1869
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Second Addition to the History of the Fishes of the Cretaceous of the United States
Vol 11, Iss 81, Page 240, Date 1869
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Notices and Descriptions of Fossils, from the Marshall Group of the Western States, with Notes on Fossils from Other Formations
Vol 11, Iss 81, Page 245, Date 1869
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On Some Etheostomine Perch from Tennessee and North Carolina
Vol 11, Iss 81, Page 261, Date 1869
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On Some Reptilia of the Cretaceous Formation of the United States
Vol 11, Iss 81, Page 271, Date 1869
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Stated Meeting, January 21, 1870
Vol 11, Iss 81, Page 277, Date 1869
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Stated Meeting, February 4th, 1870
Vol 11, Iss 81, Page 279, Date 1869
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Stated Meeting, March 4, 1870
Vol 11, Iss 81, Page 282, Date 1869
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Verbal Communication by E. D. Cope, at the Meeting of the A. Phil. Soc., Feb. 18, 1870
Vol 11, Iss 81, Page 284, Date 1869
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Fourth Contribution to the History of the Fauna of the Miocene and Eocene Periods of the United States
Vol 11, Iss 81, Page 285, Date 1869
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On Adocus, a Genus of Cretaceous Emydidæ
Vol 11, Iss 81, Page 295, Date 1869
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On the Periods of Certain Meteoric Rings
Vol 11, Iss 81, Page 299, Date 1869
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Contributions to a Grammar of the Muskokee Language
Vol 11, Iss 81, Page 301, Date 1869
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Stated Meeting, March 18, 1870
Vol 11, Iss 81, Page 310, Date 1869
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Comparison of Mechanical Equivalents
Vol 11, Iss 81, Page 313, Date 1869
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Grammar of the Choctaw Language
Vol 11, Iss 81, Page 317, Date 1869
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Stated Meeting, April 15, 1870
Vol 11, Iss 81, Page 367, Date 1869
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Stated Meeting, May 6, 1870
Vol 11, Iss 81, Page 368, Date 1869
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Observations on the Fishes of the Tertiary Shales of Green River, Wyoming Territory
Vol 11, Iss 81, Page 380, Date 1869
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On the Geological Age and Equivalents of the Marshall Group
Vol 11, Iss 81, Page 385, Date 1869
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Remarks
Vol 11, Iss 81, Page 419, Date 1869
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Sections of Strata Belonging to the "Bear River Group," near Bear River City, Wyoming Territory
Vol 11, Iss 81, Page 420, Date 1869
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A Preliminary List of Fossils, Collected by Dr. Hayden in Colorado, New Mexico and California, with Brief Descriptions of a Few of the New Species
Vol 11, Iss 81, Page 425, Date 1869
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Descriptions of Fossil Fishes, from the Upper Coal Measures of Nebraska
Vol 11, Iss 81, Page 431, Date 1869
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Stated Meeting, July 15, 1870
Vol 11, Iss 81, Page 446, Date 1869
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A Partial Synopsis of the Fishes of the Fresh Waters of North Carolina
Vol 11, Iss 81, Page 448, Date 1869
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On the Mass of Asteroids between Mars and Jupiter
Vol 11, Iss 81, Page 498, Date 1869
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A Register of Meteorological Observations Made at Bois Chêne, near Port-au-Prince, Hayti
Vol 11, Iss 81, Page 499, Date 1869
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Stated Meeting, October 7th, 1870
Vol 11, Iss 81, Page 514, Date 1869
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Stated Meeting, October 21, 1870
Vol 11, Iss 81, Page 516, Date 1869
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On the Saurodontidæ
Vol 11, Iss 81, Page 529, Date 1869
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On the Fishes of a Fresh Water Tertiary in Idaho, Discovered by Capt. Clarence King
Vol 11, Iss 81, Page 538, Date 1869
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On the Adocidæ
Vol 11, Iss 81, Page 547, Date 1869
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Eighth Contribution to the Herpetology of Tropical America
Vol 11, Iss 81, Page 553, Date 1869
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Contribution to the Ichthyology of the Maranon
Vol 11, Iss 81, Page 559, Date 1869
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On Some Species of Pythonomorpha from the Cretaceous Beds of Kansas and New Mexico
Vol 11, Iss 81, Page 574, Date 1869
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Obituary Notice of Samuel Vaughan Merrick, Esq
Vol 11, Iss 81, Page 584, Date 1869
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An Obituary Notice of Franklin Peale
Vol 11, Iss 81, Page 597, Date 1869
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On Three Extinct Astaci from the Fresh-Water Territory of Idaho
Vol 11, Iss 81, Page 605, Date 1869
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Note on Saurocephalus, Harlan
Vol 11, Iss 81, Page 608, Date 1869