DAETON.] 



NORTH AMERICAN GEOLOGY. 



729 



Pennsylvania — Continued. 

 1850. Fossils from New Red conglom- 

 erate of Pennsylvania, Lea. 

 Dauphin and Susquehanna coal 

 field, Lea. 



1852. Footmarks in sandstone in Schuyl- 



kill County, Lea. 

 Observations on magnetism, 

 Locke. 



1853. Researches in Pennsylvania, Rog- 



ers, H. D. 

 Geologic map of United States, 



etc., Marcou, J. 

 Footprints of sandstone of Potts- 



ville. Lea. 

 Wheatley, Brookdale, and 



Charleston mines, Chester 



County, Rogers, H. D. 



1854. Flexures of coal basin, Rogers, 



H.D. 

 Fossil of New Red sandstone. 



Lea. 

 Observations on plants from coal 



of Pennsylvania, Rogers, H. D. 



1855. Cause of certain markings in 



coal, Lewis, S. 

 Ueber die Geologic icon Nord- 

 Amerika, Marcou, J. 



1856. Relations of New Red to coal 



rocks of eastern Virginia and 



North Carolina, Rogers, W. B. 

 Notes in Berks County, Bertelet. 

 Fossils in Carboniferous shales, 



Rogers, H. D. 

 Structure of Philadelphia 



County, Jewell. 

 Carbonate of iron in coal meas- 

 ures and on color of. rocks, 



Rogers, H. D. 

 Lignite from Lancaster County, 



Rogers, W. B. 

 Alluvium of the .Ohio, King, A. F. 

 American geologic history, Dana, 



J.D. 

 Section in Lawrence County, 



Leasure. 

 Origin of carbonate of iron in 



coal measures, Rogers, W. B. 



1857. Illustration of surface geology, 



flitohoook, E. 



Bioadtop coal basin, Lesley, J. P. 



Direction of currents and source 

 of materials of Lower Paleo- 

 zoic, Hall, J. 



Pennsylvania — Continued. 



1857. Geology of Chester County, Hart- 



man. 



1858. Geelogy of North America, Mar- 



cou, J. 

 Geology of Pennsylvania, Rogers, 



H.D. 

 Laws of structure of most dis- 

 turbed zones of the earth's 



crust, Rogers, H. D. 

 Distribution of coal plants in 



Pennsylvania, and formation of 



coal, Lesquereux. 

 Fossil plants of coal of Pennsyl- 

 vania, Rogers, H. D. 

 Coal fields of United States and 



British provinces, Rogers, H. D. 

 Sketches of geology of United 



States, Rogers, H. D. 

 Lecture on coal. Maxwell. 

 Relations at Gwynned and Phoe- 



nixville. Lea, I. 

 Physical geography attending 



production of the Paleozoic 



strata, Rogers, H. D. 

 Paleontologiosynchronismofcoal 



of Ohip and Illinois, Stevens, 



R.P. 

 Age of rocks at Phosnixville, 



Leidy. 

 Fossil plants of coal measure 



of the United States, Les- 

 , quereux. 

 Paleozoic basin of New York, 



Bigsby. 

 , Compairison of fossil remains in 



Kentucky and Pennsylvania, 



Lesley, J. P. 

 Classification of several types of 



orographic structures, Rogers, 



H.D. 



1859. Age of Triassio of eastern United 



States, Lea. 

 Metamorphics of Atlantic Slope, 



Rogers, H. D. 

 Coal of Elk Count.T, Jackson, 



C.T. 

 Geology of Bradford County, 



Horton, G. P. 

 Instance of reversed drainage, 



Lesley) J. P. 

 Pacts regarding geological survey 

 of Pennsylvania, Rogers, H. D. 



1860. Geology of Indiana County, An- 



derson, W. 



