168 MINUTES. [May 20, 



subject with flashes of genius, with his perfect command of language 

 and his profound thought. 



His introductory chapters to the Final Report of the Second Sur- 

 vey (a most unequal work, part of which was written under stress of 

 physical and nervous depression), particularly the chapters on ''Geo- 

 logical Time," '' Geological Space" and " The Appalachian Sea," 

 with his other works previously mentioned, deserve record here. 

 These show that he is not a narrow-minded, one-sided person ; that 

 his scope embraced the sphere of human knowledge, of course with 

 limitations, as no man is omniscient. After all, his monument is to 

 be found in the publications of the Second Geological Survey, 120 

 volumes, a library in itself. 



It is our pride that he belongs to us. It is our pleasure that we 

 have now a portrait of him which may serve to perpetuate his like- 

 ness to those who shall come after him, and who will reap, perhaps 

 unwittingly, the harvest from seed which he has sown. 



Communications Published in the Transactions ^wrt' Proceedings of the 

 American Philosophical Society^ by Prof. J. P. Lesley. 



Notes on a Map intended to Illustrate Five Types of Earth Surface in 



United States between Connecticut and the Atlantic Trans. [N,S.], xiii, 307 



Insensible Gradation of Words Proc. vii, 129 



Geology of the Arctic Archipelago " " "293 



Copper Horizon " «' 329 



Becker's Aneroid " " 342 



Primary Limestone near Chadd's Ford, Pa " viii, 281 



Superclinous Oil Springs of the West '< « 262 



Coal System of Southern Virginia. " ix, 30 



Aurora at Cape Breton <' " 60 



Coal Measures at Cape Breton Proc. ix, 93, 197 



West Virginia Asphalt Proc. ix, 1S3 



Vortical Gales at Sea, January, 1864 '* " 183 



Abbeville Quarries «' « 38S 



Ancient Sea Level <' « 399 



Pennsylvania Lignite << <« 463 



Petroleum in Eastern Kentucky Proc. x, 33, 187 



Compounds of Bar Proc. x, 137 



Petroleum Well Sections " '< 227 



D'Orbigny Papyrus " « 543 



Harris Museum in Alexandria '< " 561 



Aurora of April 15, 1 869 " xi, 11 1 



Section across the Alleghany Mountains «< " 115 



Tornado at Cave City, Ky <« <« 277 



Violation of the Law of Debituminization « xii, 125 



