674 



Cope, E. D. ^ I'age. 

 Catalogue of 43 species of living Batrachia; entitled, Synopsis of 

 cold-blof)dcd Vertebrata procured by I'rof James Orton during his 

 Explorations in Peru, in 1870-77 666 



Frazek, Persifor, Jr. 



Note on the " Lithologle du Fond des Mers " of Bel esse 238 



The Approaches to a Theory of the cause of Magnetic Declination . 642, 662 



Regarding some >iesozoic Ores 651 



Facts observed In the Survey of York and Adams Counties, &c . ... 664 



Gatschet, Albert S. 



Remarks upon the T6nka\va Language 291,318 



The Timucua Language 626, 662 



Hall, Charles E. 



On the progress of the Museum and Palajontological Work of the 



Second Geological Survey of Pennsylvania for the year 1875 . ... 55 

 Contributions to Palaeontology from the Museum of the Second 



Geological Survey of Pennsylvania 621,662 



Hart, John 



The Fairy Folk, or the Fairy Lore of Spencer and Shakespeare 335 



Hartshorn, Henry 



On some disputed points in Physiological Optics 218, 232 



Haynes, Francis L. 



On the Asserted Antagonism between Nicotin and strychnia. . . .395,597 

 Kane, Thomas L. 



* Coahuila 383,391,561 



KiRKwooD, Daniel 



On Eight Meteoric Fireballs seen in the United States, from July, 1876 



to February 1877 395, 590 



On the Relative Ages of the Sun and certain of the Fixed Stars . . . 622, 662 



KoNiG, George Augustus 



On Astrophyllitc, Arfvedsonite and Zircon, from El Paso County, 

 Colorado, and a colorimetric test of Titanium before the blow-pipe 509 

 Le Conte, John 



Tabular .Synopsis of the Rhyncophora of America 381, 417 



Lesley, J. P. See Allen, Carll, above. 

 Lesquereux, Leo. 



On the progress of the North American Carboniferous Flora, in 

 preparation for tlie Second Geological Survey of Pennsylvania. . . 397 

 Mansfjeld, a. K. 



On Refraction TaV)les 381, 425 



Nettleton, E. S. See Carll above. 

 Prick, E. K. 



On the Glacial Epoch 217, 231,241 



A circular adopted by the Commissioners of Fairmoiint Park. Trees 



for the Park. Committee Report. The Michaux Trees 277, 340 



Sadtler, Samuel P. 



On the Composition of the Natural Gas from certain Wells in Western 

 Pennsylvania 206 



Same. Wells in Western Pennsylvania and New York 685 



Smith, E. F. 



On some new chlorine derivations from Totuole 667 



