BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 53 
Condra, George Evart. 
566. Observations <>n glacial accumulations of Nebraska. — Abstract : Sci- 
ence, new ser., vol. 23, p. 620, April 20, 1906. 
567. Oil and gas possibilities in Nebraska. — Abstract: Science, new ser., 
vol. 23, p. 621, April 20, 1906. 
568. A new limestone in the Indian Territory. — Abstract : Science, new ser.. 
vol. 23, p. 624. April 20, 1906. 
569. Geography of Nebraska. Lincoln, Nebraska, The University Publish- 
ing Co., 1900. 192 pp., 118 figs. 
Describes physiographic features. 
570. Geology and water resources of the Republican River Valley and 
adjacent areas, Nebraska. — U. S. Geol. Survey. W.-S. and Irrig. Paper, no. 216, 
71 pp., 13 pis., 3 figs., 1907. 
571. Opening of the Indian Territory. — Am. Geog. Soc. Bull., vol. 3'.). no. *'». 
pp. 321-340, 9 figs., June. L907. 
Includes a general account of the physiography, geology, and mineral resources. 
Congres geologique international. 
572. Proces- verba ux des seances generates. — Compte Rendu de la X" session. 
Mexico, 1906, pp. 108-156, 1907. 
Contains discussions of papers relating to the geology of North America. 
Connecticut, State Geological and Natural History Survey. 
573. Second biennial report of the commissioners, 1905-1906. Hartford 
Press, 1906. 23 pp. 
An administrative report. 
Cook, C. W. 
Datolite from Westfield, Massachusetts. — See Kraus and Cook, no. 1426. 
Cook, Edward H. 
574. La mina Santa Francisca. — Mexico, Secretaria de Fomento, Bol., 2 a 
epoca, ano 6. no. 6, II, pp. 562-569, 2 pis., 1907. 
Gives notes upon the local geology and the occurrence and character of the silver ores 
at the Santa Francisca mine in the state of Aguascalientes, Mexico. 
Cooper, W. F. 
575. Geological report on Bay County [Michigan]. — Michigan State Bd. 
of Geol. Survey, Ann. Rept., 1905, pp. 135-426, 17 pis.. 1906. 
Descrihes the occurrence and character of Carboniferous and Devonian strata, of 
Quaternary deposits, and of the coal seams, the physical geography and drainage, the 
economic products, and the water supply. 
576. Geology and physical geography of Michigan. — Michigan Acad. Sri.. 
Ninth Rept.. pp. 136-144, 1907. 
Discusses various physiographic features of Michigan: origin and tilting of the Greal 
Lake hasins, pre-Glacial drainage, terraces, etc. 
Corey, G. W. 
577. The Nonesuch sandstone. — Eng. and Min. Jour., vol. 82, p. 778, 1 tig.. 
October 27, 1906. 
Descrihes the character of the copper ore in the Nonesuch mine, Porcupine district. 
Michigan. 
Corkill, E. T. 
578. Mines of Ontario.— Ontario, Bur. Mines, Rept, 1906, vol. 15, pt. l. 
pp. 47-107, 35 tigs.. 1900. 
Includes notes on the occurrence and geology of ore bodies. 
579. Mica in Ontario. -Canadian Min. Jour., vol. 28, no. 9 (new ser.. vol. 1. 
no. 7), pp. 11)6-200. 6 tigs., June 15, L907. 
