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A geological section through the John Day basin. (Jour. Geol., 
vol. 9, Jan. -Feb., 1901, p. 71 ; Am. Geol., vol. 27, Feb 1901, p. 132.) 
Merrill, Geo. P. 
The chemical and economic properties of building stones. (Mary- 
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Newell, F. H. 
The Hydrography of Allegany county. (Md. Geol. Sur., Alle- 
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Nickles, J. M. (and R. S. Bassler) 
A synopsis of American fossil Bryozoa, including bibliography and 
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O'Harra, C. C. 
The Geology of Allegany county. (Geol. Sur., Md., Allegany 
county, pp. 57-163, pis. 7-16, 1900.) 
O'Harra, C. C. (Wm B Uark, R. B. Rowe and H. Ries) 
The mineral resources of Allegany county. (Md. Geol. Sur., 
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Penhollow, D. P. 
A decade of North American Paleobotany. (Science, vol. 13, p. 161, 
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Purdue, A. H. 
Valleys of solution in northern Arkansas. (Jour. Geol., vol. 9, pp. 
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The mineral resources of Allegany county. (Md. Geol. Sur., 
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Sardeson, F. W. 
Problem of the Monticuliporidae, i. (Jour. Geol., vol. 9, pp. 1-27, 
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The Geology of Vermont. (The Vermonter, vol. 5, pp. 53-67, Feb., 
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Glacial action in Schoharie valley. (Am. N. Y. Acad. Sci., vol. 
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