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Purington, C. W. 
A single occurrence of glaciation in Siberia. (Am. Geol., vol. 27, 
pp. 45-47, Jan., 1901.) 
Ruedemann, Rudolf 
Hudson River beds near Albany, and their taxonomic equivalents. 
(Bull. G. S. A., vol. 12. p. II. (Abstract) Nov., 1900.) 
Salisbury, R. D. (and Wm. C. Alden) 
The geography of Chicago and its environs. (Bull. Geog. Soc, 
Chicago, No. i, pp. 64, plates and maps, 1899.) 
Scott, W. B. 
The Mammalian fauna of the Santa Cruz beds of Patagonia 
(Science, vol. 12, pp. 937-940, Dec. 21, 1900.) 
Sheldon, J. W. Arms 
Concretions from the Champlain clays of the Connecticut valley, 
4to pp. 4":, 14 plates. Boston, 1900. 
Smith. J. P. 
Principles of paleontologic correlation. (Jour. Geol.. vol. 8. pp. 
673-697, Nov.-Dec, 1900.) 
Turner, H. W. 
Geology of the Silver Park range, Nevada. (Bull. G. S. A., vol. 
12, pp. 2-4, Nov., 1900.) 
Upham, Warren 
Pleistocene ice and river erosion in the St. Croix valley' of Minne- 
sota and Wisconsin. (Bull. G. S. A., vol. 12, pp. 13-44. Nov. 1900.) 
Upham, Warren 
Giant's Kettles eroded by Moulin torrents. (Bull. G. S. A., vol. 
12, pp. 25-44, Dec, 1900.) 
Van Horn, Frank R. 
Andesitic rocks near Silverton, Colorado. (Bull. G. A. S., vol. 12, 
pp. 4-9, Nov., 1900.) 
Van Hise, C. R. 
Some principles controlling the deposition of ores. (Jour. Geol., 
vol. 8, pp. 730-770, Nov.-Dec, 1900.) 
Washington, H. S. 
Chemical study of the Glaucophane schists. (Am. Jour. Sci., vol. 
xi. pp. 35-59, Jan- 1901.) 
White, T. G. 
New York Academy of Sciences. (Section of geology and mineral- 
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Whiteaves, J. F. 
Description of a new species of Unio from the Cretaceous rocks of 
the Nanaimo coal field. (Ottawa Naturalist, vol! 14, pp. 177-179, Jan., 
1901.) 
Wilder, Frank A. 
Observations in the vicinity of Wall lake. (Proc Iowa Acad. Sci., 
vol. vii, pp. 77-82. Des Moines. 1900.) 
