Author's Catalogue. 129 
Dumble, E. T. 
Natural coke of the Santa Clara coal fields, Sonora, Mexico. 
(Trans. Am. Inst. Min. Eng., Cal. Meeting, Sept, 1889. 4 pp.) 
Dumble, E. T. 
Cretaceous of Obispo Canon, Sonora, Mexico. (Trans. Tex. 
Acad. Sci., vol. 4. 1900.) 
Dumble, E. T. 
Occurrence of oyster shells in volcanic deposits in Sonora Mex- 
ico. (Trans. Tex. Acad. Sci., vol. 4-. 1900.) 
Dumble, E. T. 
Geology of the Beaumont oil fields. 5 pp. June .?8, 1901. Hous- 
ton, Tex. 
Fairchlld, H. L. 
Beach structures in the Medina sandstone. (Am. GoL, vol. 28, pp. 
9-14, pis. 2-6. July, igoi.) 
Frazer, Persifor 
Eighth session of tlie International Congress of Geologists, Paris, 
1901. (Am. Geol., vol. 27, pp. 335-342. June, 1901.) 
Grabau, A. W. 
Guide to the Geoloev and Paleontolop"" of Niagara Falls and 
vicinity. (Bull. N. Y. State Mus., vol. 9, No. 45, pp. 2:^7, 18 plates. 
Albany, April, 1901.) 
Hershey. Oscar H. 
The age of the Kansan drift-sheet. (Am. Geol., vol. 28, pp. 20- 
25. July, 1901.^ 
Hopkins, T. C. 
A short discussion of the origin of the Coal Measures fire-clays. 
(Am. Geol., vol. 28, pp. 47-51. July, 1901.) 
Keyes, C. R. 
Names of coals west of the IMississippi river, pp. 10. 
Keyes, C. R. 
Volcanic rocks of Piatigorsk, southern Russia, pp. 2. 
Keyes, C. R. 
Depositional equivalent of the hiatus at the base of our Coal 
Measures; and the Arkansas series, a new terrane of the Carboniferous 
in the western interior basin, pp. 10. 
Keyes, C. R. 
Nomenclature of the Cambrian forn.iations of the St. Francois 
mountains. (Am. Geo)., vol. 28, pp. 51-53. July, 190T.) 
Keyes, C. R. 
Ore formation on the hypothesis of concentration through surface 
decomposition. (Am. Geo]., vol. 27, t)]). ''^5-362. June, 1901.) 
Keyes, C. R. 
Geology in the Twentieth Century. (The Arena, July, 1901.) 
