254 The American Geologist. October. 1900 
Calvin, Samuel (and H. F. Bain) 
Geology of Dubuque county. (Ann. Rep. Geol. Sur. Iowa, vol. 
10. 1899. pp. 385-651-) 
Chamberlin, T. C 
On the liabitat of the early vertebrates. (Jour. Geol., vol. 8, July- 
Aug., 1900, pp. 400-412.) 
Collie, Geo. L, 
The gross topog-aphy of the globe. (Bull. Am. Bureau of Geog- 
raphy, vol. I, pp. 8, 1900.) 
Collie, Geo. L. 
Physiography in the schools, (Bull. Am. Bureau of Geography, 
vol. I, Mar. 1900.) 
Cummings, E. R. 
Lower Silurian system of eastern Montgomery county, N. Y. 
(Bull. N. Y. State Museum, vol. 7, pp. 419-468, maps. May, 1900.) 
Davis, H. J. 
Modification of the Jonathan creek drainage basin. (Bull. Sci. 
Lab. Den, Univ.. vol. 11, pp. 165-173, Mar. 1899.) 
Davis, W. M. 
The physical geography of the Lands. (Pop. Sci. Month, vol. 59, 
pp. 157-180, June, 1900.) 
Derby, O. A. 
Certain schists of the gold and diamond regions of eastern Minas 
Geraes, Brazil. (Am. Jour. Sci., vol. 10, pp. 207-216, Sept. 1900.) 
Derby, O. A. 
Monazite. (Am. Jour. Sci., vol, 10, pp. 217-221, Sept. 1900.) 
Dowling, D. B. 
A condensed summary of the field-work annually accomplished by 
the ofificers of the geological survey of Canada from its commence- 
ment to 1865. (Ottawa Naturalist, vol. 14, pp. 107-118. Sep. 1900.) 
Eastman, C. R. 
Upper Devonian fish-fauna of Delaware county, N. Y. (17th Ann. 
Rep., State Geologist of N. Y. pp. 317-327, 1899.) 
Ford,W. E.(S. L. Penfield and) 
Interesting developments of calcite crystals. (Am. Jour. Sci., vol. 
10, pp. 237-244, Sept. 1900.) 
Fowke, Girard. 
Preglacial drainage in the vicinity of Cincinnati: its relation to the 
origin of the modern Ohio river, and its bearing on the question of the 
southern limits of the ice-sheet. (Bull. Sci. Lab. Den. Univ., vol. 11, 
pp. i-io. Mar. 1898.) 
Frazer, Persifor. 
The life and letters of Edward Drinker Cope. (Am. Geol., vol. 26, 
pp. 67-128, portrait and plates. Aug. 1900.) 
