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Report of the Progress of the Geological Survey of the State of Virginia, 

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On the Age of the Coal Rocks of Eastern Virginia. Trans. Assoc. 

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Some observations of Subterranean Temperature in the Coal Mines of 

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 1840-42. pp. 9.* 



On the connection of Thermal Springs in Virginia with Anticlinal Axes 

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On the age of Coal Rocks of Eastern Virginia. Amer. Geol. and Nat. 

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On the connection of Thermal Springs in Virginia with Anticlinal Axes 

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Observations of Subterranean Temperature of the Coal Mines of Eastern 

 Virginia. Amer. Geol. and Nat. Assoc. Reports, 1843, pp. 532-538 ; Bibl. 

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On the Phenomena of the great Earthquakes which occurred during 

 the past Winter, one in this country and the other in the West Indies, and 

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An account of some new Instruments and Processes for the analysis of 

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A system of classification and nomenclature of the Palaeozoic Rocks of 

 the United States, with an account of their distribution, more particularly 

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On the Gold Region of the United States. Proc. Amer. Assoc. Adv. 

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On Mechanical Powers. Proc. Amer. Assoc. Adv. Science, 1850. 

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On Acid and Alkaline Springs. Amer. Assoc. Proc, 1848. pp. 94-95 ; 

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Elements of Mechanical 'Philosophy, for the use of the Junior Students 

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On Binocular Combinations. Proc. Amer. Acad., iii, 1852-57, p. 213. 



On the Ozonometer. Proc. Amer. Acad., 1852-1857, p. 220. 



Report on the Pridevale Coal and Iron Ore, West Virginia, 1854. pp. 27.* 



* Reprinted in the Geology of the Virginias, 1884. 



