DARTON.] 



NORTH AMERICAN GEOLOGY. 



613 



Maryland (including District of Colum- 

 bia) — Continued. 



1883. Culture and curing of tobacco, 



Killebrew. 

 Baltimore surface geologyi 

 Science. 



1884. So-called quartz porphyry at Hol- 



lins, Williams, G. H. 



Gabbros and hornblende rocks 

 near Baltimore, Williams, G. H. 



Indications of a fault near Har- 

 pers Ferry, Walling. 



Washington building stones, 

 Merrill, G. P. 



Maryland building stones, Mon- 

 roe and Singleton. 



Illustrations of polished rock sur- 

 faces, Morgan, H. J. 



Microscopic structure of building 

 stones, Merrill, G. P. 



Lithology of District of Colum- 

 bia, Merrill, G. P. 



Tertiary of Eastern and Southern 

 States, Heilprin. 



Paramorphosis of pyroxene to 

 hornblende, Williams, G. H. 



Contributions to Tertiary geol- 

 ogy, Heilprin. 



Gravels of northern Delaware 

 and Maryland, Chester. 



1885. Dikes of apparently eruptive 



granite near Baltimore, Wil- 

 liams, G. H. 



Bowlders of decomposition at 

 Washington, Spencer, J. W. 



Gravels of south Delaware penin- 

 sula, Chester. 



Map of the United States, MoGee. 



Rogers's geology of the Virginias) 

 Campbell, J. L. and H. D. 



Strata in shaft of waterworks at 

 Washington, Robinson, T. 



Geology of Washington, McGee. 



1886. Head of Chesapeake Bay, McGee. 

 Gabbros and associates near 



Baltimore, Williams, G. H. 

 Samples of iron ores, Benton. 



1887. Map of United States, Hitch- 



cock, C. H. 

 Plan for map of Baltimore region, 

 Williams, G. H. 



1888. Age of Potomac formation, Ward, 



L.F. 



Maryland (including District of Colum- 

 bia) — Continued. 



1888. Albirupean and associated forma- 



tions, Heilprin, Lewis, H. C; 

 Uhler. 



Progress in Archean geology, 

 Williams, G. H. 



Coal, Ashburner. 



Columbia formation, MoGee. 



Eocene and Cretaceous, Uhler. 



Excursions into southern coun- 

 ties, Clark. 



Geology of the Baltimore region, 

 Williams, G. H. 



Geology of head of Chesapeake 

 Bay, McGee. 



Infusorial earth, Day. 



Report of Potomac division. 

 United States Geological Sur- 

 vey, McGee. 



Rocks from near Ilohester, How- 

 ard County, Hobbs. 



Sauropoda from Potomac forma- 

 tion. Marsh. 



Three formations of the middle 

 Atlantic Slope, McGee. 



Report of division of paleobotany. 

 Ward, L. F. 



1889. Paragenesis of allanite and epi- 



dote, Hobbs. 



Antecedents of man in the Poto- 

 mac Valley, McGee. 



Cretaceous in Anne Arundel and 

 Prince George counties, Clark, 

 W. B. 



Cretaceous of southwestern Mary- 

 land, Bryan. 



Contributions to mineralogy, 

 Williams, G. H. 



Potomac woods and lignites, 

 Knowlton. 



Analysis of Triassic sandstone, 

 Clarke, F.W. 



Building stones, Merrill, G. P. 



Fossil wood of Potomac forma- 

 tion, Knowlton. 



Report — Division of paleobotany, 

 United States Geological Sur- 

 vey, Ward, L. F 



Report — Division of vertebrate 

 paleontology, United States 

 Geological Survey, Marsh. 



1890. Analyses of rocks from Balti- 



more County, Chatard, Whit- 

 field, J. E. 



