TABLE OF CONTENTS— CojiimMed. page. 



Section of the Cumberland coal basin. By Howard Grant Jones. . . . Ill 



Stated Meeting, Oct. 1 117 



Special Meeting, Oct. 11 117 



Memoir of George B. Wood, M.D. By H. Hartshorne, M.D 118 



Stated Meeting, Oct. 15 153 



On Dr. Valentiui's critique of Landa's Mayan alphabet. By /. P. 



Lesley 154 



On a Kitchen heap at Saltville, in Southwestern Virginia. By H. G. 



Lewis ., 155 



Objections to the recent age of the Virginia faults. By J. P. Lesley. 155 



Photograph of the nebula in Orion. By Dr. Henry Draper 157 



Election of new members 158 



Stated Meeting, Nov. 5 158 



Obituary notice of Dr. John Neill. By Dr. Brinton .' Ifil 



A review of the species of Anisodactylus inhabiting the United States. 



By Oeorge H. Horn, M.D 162 



List of papers communicated to the American Philosophical Society 



by Pliny Earle Chase 184 



Stated Meeting, Nov. 19 191 



Note on an engraved disk from Guatamala. By Mr. Dubois 191 



Resolutions respecting the Magellanic premium 192 



Notes on models made by the Second Geological Survey of Pennsyl- 

 vania. By J. P. Lesley 193 



Stated Meeting, Dec. 3 194 



Resolutions respecting x. y. z. essay 195 



Amendment of the by-laws 195 



Stated Meeting, Dec. 17 196 



Analysis of a pure dolomite from Franklin county. By A. S. 



McCreatli 197 



Notes on the place of the Sharon Conglomerate in the Palaeozoic Series. 



By/. (7. White 198 



Photodynamics. 'By Pliny Earle Chase 203 



Extract from the By-Laws. 



CHAPTER XII. 



OP THE MAGELIiANIC FUND, 



Section 1. John Hyacinth de Magellan, in London, having in the year 

 1786 offered to the Society, as a donation, the sum of two hundred guineas, 

 to be by them vested in a secu.re and permanent fund, to the end that the 

 interest arising therefrom should be annually disposed of in premiums, to 

 be adjudged by them to the author of the best discovery, or most useful in- 

 vention, relating to Navigation, Astronomy, or Natural Philosophy (mere 

 natural history only excepted) ; and the Society having accepted of the 



