TABLE OF CONTENTS. 1 ( .)5 



Page. 

 in Illinois. Work of W. B. Rogers in Virginia. Rogers's lack of facilities 

 for work. Sketch of W. B. Rogers. State Geological Survey of New 

 York. State Geological Survey of Pennsylvania. The Wilkes Exploring 

 Expedition. C. T. Jackson's survey of Maine; of Rhode Island. Jack- 

 son's views on the drift. J. C. Booth's geological survey of Delaware. 

 D. D. Owen's geological survey of Indiana. Sketch of D. D. Owen. 

 Owen's survey of Iowa, Wisconsin, and Illinois. Gesner's work in New 

 Brunswick. Conrad's work on the Tertiary. Work of James T. Hodge 

 in southern Atlantic States. Sketch of Conrad. Conrad's ideas concern- 

 ing the drift. Views of George E. Ha} r es. C. T. Jackson's survey of New 

 Hampshire. Douglass Houghton's work in Michigan. Sketch of Hough- 

 ton. 



CHAPTER IV. 



The Era of State Surveys, Second decade, 1840-1849 363 



Generalities. Effect of the panic of 1836 upon the establishment of State 

 surveys. Enumeration of workers. Founding of the Smithsonian Institu- 

 tion. Louis Agassiz's glacial theory. First geological model, by R. C. Tay- 

 lor. Work of Gerard Troost in Tennessee. Edward Hitchcock on drift 

 phenomena in North America. T. A. Conrad's work in Florida. D. D. 

 Owen on the geology of the Western States. H. D. and W. B. Rogers 

 on Appalachian structures. Views of Rogers brothers as to the origin of 

 the Appalachians. H. D. Rogers on the formation of coal. W. B. Rogers 

 on thermal springs. J. P. Couthouy on coral growth. W. Byrd Powell's 

 work in the Fourche Cove region of Arkansas. State Geological Survey 

 of New York. Work of Mather, Emmons, Vanuxem, and .Hall. Sketch 

 of James Hall. Hall's work in Ohio. Hall's views concerning Niagara. 

 Establishment of the Geological Survey of Canada under W. E. Logan. 

 Issachar Cozzens on the geology of New York. Byrem Lawrence's Geol- 

 ogy of the Western States. Work of Edmund Ruffin and Michael Tuomey 

 in South Carolina. Sketch of Tuomey. J. D. Dana's views on metamor- 

 phism. Edward Hitchcock on the trap tufa of the Connecticut Valley 

 and inclined strata. H. D. Rogers on the atmosphere of the coal period. 

 Lardner Vanuxem on changes in the earth's atmosphere. Work of C. B. 

 Adams in Vermont. Sketch of Adams. Sketch of Zadock Thompson. 

 Hitchcock's description of the Richmond bowlder train. W. W. Mather 

 on the physical geology of the United States. Conrad's Medial Tertiary 

 of North America. Geological observations of David Christy. Explora- 

 tions in New Mexico by F. A. Wislizenus. Amos Binney's views on the 

 Loess. Dana on the Geological Results of the Earth's Contractions. 

 Sketch of J. D. Dana. Views of H. D. and W. B. Rogers on the Rich- 

 mond bowlder train. Views of J. B. Perry and E. R. Benton on the same. 

 Final report of Michael Tuomey on the geology of South Carolina. Tuo- 

 mey's survey of Alabama. F. S. Holmes on the geology of Charleston 

 and vicinity. Howard Stanshury's explorations in Utah. Work of D. D. 

 Owen in the Chippewa land district, and in Wisconsin, Iowa, and Minne- 

 sota. First description of vertebrate fossils from the Bad Lands. Work 

 of C. T. Jackson in Michigan. Louis Agassiz's Physical Characters of 

 Lake Superior. Sketch of Agassiz. Work of J. W. Foster and J. D.' 

 Whitney in Michigan. James Hall's report on the formations of Lake 

 Superior. His attempt to show the equivalency of the formations of New 

 York with those of Europe. E. Desor on the drift. J. D. Dana and the 

 Wilkes Exploring Expedition. Dana's views on coral islands; on vulcan- 

 ology. P. T. Tyson's work in California. James Higgins's work in 

 Maryland. P. T. Tyson's work in Maryland. 



