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Central Iowa and Related Phenomena. A dissertation presented to 
the Faculty of Arts, Literature and Science of the University of Chi- 
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of Chicago, 1897. 
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in the Study of Daemonelix. 
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U.S. Dept. of Agriculture, Weather Bureau, 1897. 
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and Maryland. Bulletin Geol. Society of America, Vol. VIII, pp. 315— 
358, pls. 40-50. 
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Davenport Academy of Sciences, Proceedings, Vol. VI, 1896-7. Daven- 
port, Ia., 1897. 
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Address Geological Society of Washington, December 1896. 
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held at Washington, December 29, 30 and 31, 1896. Bulletin Geol. 
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Geographical Society of Philadelphia. Map of the Arctic Regions com- 
prising the most Recent Explorations of Robert E. Peary, F. Nansen 
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