vm. 



Descriptions of live new Species of Fossil Footmarks, from the 

 New Red Sandstone of the Valley of Connecticut River. By Prof. 

 Edward Hitchcock, LL. D. ....... 254 



On the Polished Rocks of Rochester, N. Y. By Rev. Chester 

 Dewey, of Rochester. 264 



Notes, explanatory of a Section from Cleveland, Ohio, to the Mis- 

 sissippi River, in a Southwest directioii, with Remarks upon the 

 identity of the Western Formations with those of New York. By 

 James Hall, of Albany,. N. Y 267 



Description of several Species of Fossil Plants, from the new Red 

 Sandstone Formation of Connecticut and Massachusetts. By Prof. 

 Edward Hitchcock 294 



Description of the Oxide of Tin found at the Tourmaline Locali- 

 ty, Chesterfield, Mass. By J. E. Teschemacher, of Boston. . 296 



On the Age of the Coal Rocks of Eastern Virginia. By William 

 B. Rogers, Prof. Nat. Philosophy, in the Univ. of Virginia. . . 298 



Description of the Tin Veins of Jackson, N. H. By Charles T. 

 Jackson, M. D., of Boston, State Geologist. .... 316 



Remarks on Zinc, Lead, and Copper Ores of New Hampshire. 

 By C. T. Jackson, M. D 321 



On the connection of Thermal Springs, in Virginia, with Anticli- 

 nal Axes and Faults. By Prof. William B. Rogers, University of 

 Virginia. 323 



Notes on the Geology of several parts of Western Asia ; founded 

 chiefly on Specimens and Descriptions from American Missiona- 

 ries. By Prof. Edward Hitchcock, Amherst College, Mass. . 348 



Remarks upon Casts of Mud Furrows, Wave Lines, and other 

 Markings upon Rocks of the New York System. By James Hall, 

 of Albany, N. Y " . . . 422 



Ai\ Inquiry into the Origin of the Appalachian Coal Strata, Bitu- 

 minous and Anthracitic. By Henry D. Rogers, Prof, of Geology, 

 in the University of Pennsylvania, Philadelphia. .... 433 



On the Physical Structure of the Appalachian Chain, as exempli- 

 fying the Laws which have regulated the elevation of great INIoun- 

 tain Chains, generally. By Professors W. B. Rogers and H. D. 

 Rogers 474 



Observations of Subterranean Temperature in the Coal-Mines of 

 Eastern Virginia. By Prof. William B. Rogers, University of 

 Vircrinia. • . 532 



