36 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, [hull. 27 
Cook (Alfred N.). 
1. A new deposit of fuller's earth. 
Iowa Acad. Sci., Proc. for 1903, vol. 11, pp. 135-137, 1904. 
Describes the chemical composition of a specimen of fuller's earth from th 
Black Hills of South Dakota. 
Cooper (W. F.). 
1. Notes on the wells, springs, and general water resources of lowe 
Michigan. 
U. S. Geol. Surv., AVater-Supply and Irrigation Paper no. 102, pp. 489-51S 
1904. 
Corkill (E. T.). 
1. Notes on the occurrences, production, and uses of mica. 
Can. Mg. Inst., Jour., vol. 7. Advance separate, 23 pp., 6 figs., 1904. 
Describes the occurrence and mining of mica in India, the United States, an 
Canada, particularly the occurrence and geologic relations of deposits i 
Quebec and Ontario. 
Corss (Frederic). 
1. The buried valley of Wyoming [Pennsylvania]. 
Wyoming Hist. & Geol. Soc, Proc. & Coll., vol. 8, pp. 42-44, 1904. 
Describes the position, formation, and filling of a pre-Glacial valley •< 
Wyoming. 
Coste (Eugene). 
1. Volcanic origin of natural gas and petroleum. 
Can. Mg. Inst., Jour., vol. 6, pp. 73-123, 1904. 
Gives a full presentation of facts confirmatory of the theory of the volcan jj 
origin of natural gas and petroleum. 
2. The volcanic origin of oil. 
Am. Inst. Mg. Engrs., Trans. (Atlantic City meeting, February, 1904), 10 p] i 
3. Volcanic origin of oil. 
Franklin Inst, Jour., vol. 157, pp. 443-454, 1904. 
Discusses volcanic origin of oil with particular reference to the Texas-Louisiai 
oil district. 
Cowan (John L.). 
1. The arsenic mines at Brinton, Virginia. 
Eng. & Mg. Jour., vol. 78, pp. 105-100, 2 figs., 1904. 
Describes the occurrence of arsenic ores at Brinton, Virginia, and their ec 
nomic development. 
Cragin (F. W.). 
1. A stud\ T of some teleosts from the Russell substage of the Platl 
Cretaceous series. 
Colo. Coll. Studies, vol. 9, pp. 25-37, 3 pis., 1901. 
Crane (W. R.), Adams (George I.), Haworth (Erasmus), and. 
1. Economic geology of the Iola quadrangle, Kansas. 
See Adams (George I.), Haworth (Erasmus), and Crane (W. R. ), 1. 
