M^ ^'S ■ ^1^^// z/^- 



■PEOCEEDINGS 



OP THE 



AMERICAN PHILOSOPHICAL SOCIETY, 



HELD AT PHiLADELPHIA, FOR PROMOTING USEFUL KNOWLEDGE. 



Vol. XX. . January to June, 1882. No. 111. 



TABLE OF CONTENTS. 



PAGE. 



On the Origin and Drainage of the Basins of the Great Lakes. By 



/. S. Newberry 91 



Discussion. J. P. Lesley : 95 



An Obituary Notice of William E. DuBois. By Robert Patterson. . 102 

 Note on the Laramie Group in the vicinity of Raton, New Mexico. 



By Jo7m J. Stevenson 107 



On a New Substance resembling Dopplerite from a Peat Bog at 



Scranton. By Henry Carvill Leicis. ........... • 113 



Rockery at the University of Pennsylvania, built in 1881. By Eli 



K Price. 119 



The Vagus Nerve in the Domestic Cat (Felis domestica). By T. B. 



Stowell 123 



Contributions to the History of the Vertebrata of the Lower Eocene 



of Wyoming and New Mexico, made during 1881. By JEJ. D. Cope. 139 



Stated Meeting, January 6 197 



An Obituary Notice of William Milnor Roberts. 199 



Stated Meeting, January 20 202 



Stated Meeting, February 3. 204 



On the Inclination of the Apparent to the True Horizon and the 

 Errors rising thereof in Transit, Altitude, and Azimuth-Obser- 

 vations. By John Hagen 206 



Stated Meeting, February 17 224 



Stated Meeting, March 3 225 



An Obituary Notice of John W. Draper, M. D., LL.D. By William 



A. Hammond, M. B 227 



Stated Meeting, March 17 229 



Corundum and Wavellite. By Edgar F. Smith and N. Wiley Thomas. 230 



Stated Meeting, April 7 231 



Stated Meeting April 21 223 



Remarks on the death of Charles Robert Darwin. By John L. Le 



Gonte, 3£ D. 235 



Photodynamic Notes, V. By Pliny Earle Chase 237 



On the Aurora of April 16-17, 1882. By H. Garmll Lewis. 283 



Stated Meeting, May 5 291 



Biographical Sketch of Thomas Potts James. By J. T. Bothrock.. . 293 



Stated Meeting, MoA^ 1^ 298 



