DARTON.] 



NORTH AMERICAN GEOLOGY. 



699 



New York — Continued. 



1886. Niagara River, gorge and falls, 



Hovey, Pohlman. 



Thickness of Onondaga salt group 

 at Buffalo, Pohlman. 



Orange County geology, Darton. 



Peridotites near Peekskill, Wil- 

 liams, G. H. 



Place of Niagara Falls in geologic 

 history, Gilbert, G. K. 



Revision of Devonian section at 

 Cayuga Lake, Williams, H. S. 



Schistose rocks of Adirondacks, 

 Britton, Julien. 



Additional notes on Staten Island, 

 Britton. 



Structure of clay near Newburg, 

 Dwight. 



Tully limestone, Williams, S. G. 



Cambrian age of slates at Gran- 

 ville, Washington County, Wal- 

 cott. 



Westward extension of the Lower 

 Helderberg, Williams, S. G. 



1887. Fire sand of Clinton County, 



Brainerd. 



Notes on Tilly Foster mine, Rutt- 

 man. 



Distribution of natural gas. Ash- 

 burner. 



Map of United States, Hitchcock, 

 C.H. 



Development of chemical indus- 

 tries (salt), Wyatt. 



Taconio limestone of Canaan, 

 Dwight. 



Nature and origin of Staten Is- 

 land serpentine, Gratacap. 



Recent Held work in Archean, 

 Britton. 



Staten Island drifts, Britton. 



Wappinger Valley limestones, 

 Dwight. 



Well at Clifton, Staten Island, 

 Hollick. 



Prehistoric hearth under drift at 

 Buffalo, Gilbert, G. K. 



Origin of serpentines near New 

 York City, Britton, Gratacap. 



Tully limestone, Williams, S. G. 



Genetic history of crystalline 

 rocks, Hnnt, T. S. 



Rock salt in western New York, 

 Newberry. 



Salt mines of western New York, 

 Bishop. 



New York — Continued. 



1887. Oneonta sandstone, Beecher and 



Hall, Hall, J. 



Mohawk Valley, Beecher and 

 Hall, Hall, J. 



Lower Helderberg of Cayuga 

 Lake, Williams, S. G. 



Lower Paleozoic graptolitos, 

 Lap worth. 



Norites of Cortland series, Wil- 

 liams, G. H. 



Geology of Long Island, Daua, 

 J. D. 



Geology of Staten Island, Brit- 

 ton. 



Serpentine of Syracuse, Williams, 

 G.H. 



Fossils of Staten Island drift, 

 Gratacap. 



Minerals of Staten Island, Cham- 

 berlin, B. 



Taconicsystem, Dana, J.D. ; Mil- 

 ler, Walcott. 



Taconic question restated, Hunt, 

 T.S. 



Kersantite at Croton Landing, 

 Newberry. 



Taconic rocks and stratigraphy, 

 Dana, J. D. 



Age of Niagara River, Spencer, 

 J.W. 



Attica sink holes, Clarke. 



Cambrian trilobites from Pough- 

 keepsie, Newberry. 



Cortland rocks, Callaway. 



Cutting at Croton Point, War- 

 ring. 



Eozoiinal rock of Manhattan Is- 

 land, Gratacap. 



Faunas of Upper Devonian, Gen- 

 esee section, Williams, H. S. 



Fauna of Upper Taconic, Wash- 

 ington County, Walcott. 



1888. Archean plant from limestone 



of Sussex County, N. J. ; rela- 

 tions of limestone outliers, 

 Britton. 



Beaches on southern side of Long 

 Island, Brysou. 



Boring on Staten Island, Britton. 



Brief history of Taconic ideas, 

 Dana, J. D. 



Columbia formation, McGee. 



Contact metamorphism in rocks 

 adjoining Cortland series near 

 Peekskill, Williams, G. H. 



