BIBLIOGKAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 25 
Bell, Robert — Continued. 
191. [Report on] the Cobalt mining district.— Canada, Geol. Survey, Summ. 
Rept. for 1905, pp. 94-104, 3 pis., 1906; Canadian Min. Rev., vol. 27, no. 4, pp. 
116-124, October, 1906. 
Gives an account of the general geology of the area, the occurrence, and character <>f 
the silver ores, and the mining operations. 
192. Cobalt district and northward.— Canada, Geol. Survey, Summ. Rept. 
for 1906, pp. 110-112. 1906. 
Gives notes on the occurrence of the ores containing silver, nickel, and cobalt. 
193. The occurrence of diamonds in the drift of some of the northern 
States. — Eng. and Min. Jour., vol. 82, p. 819, November 3. 190(5 : Canadian Min. 
Inst, Jour., vol. 9, pp. 124-127, 1906. 
Discusses the possible sources of the diamonds found in drift and the movement of 
the drift. 
194. The Cobalt mining district. — Canadian Min. Jour., vol. 28, no. 10 (new 
ser., vol. 1, no. 8), pp. 246-248, July 1. 1907. 
Describes the geology of the Cobalt district, Ontario, and the character and occur- 
rence of the ore deposits. 
Bell, Robert N. 
195. Seventh annual report of the mining industry of Idaho for the year 
1905.— Idaho, Rept. State Inspector of Mines, 1905, 149 pp., illus. [1906]. 
Contains notes on the character, occurrence, and geologic relations of ore deposits. 
196. Eighth annual report of the mining industry of Idaho for the year 
1906. 175 pp., illus., 1907. 
Includes notes on the occurrence of ores. 
197. South Mountain, Idaho.— Eng. and Min. Jour., vol. 83, pp. 283-284, 
2 figs., February 9, 1907. 
Describes the geologic structure and the occurrence of the ore deposits. 
198. Sapphires in Idaho.— Min. World, vol. 26, p. 449, April 6, 1907. 
199. The gold of the Snake River [Idaho].— Min. and Sci. Press, vol. 94, 
pp. 542-543, 3 figs., April 27, 1907. 
Bement, A. 
200. The necessity for a geological survey of Illinois. — Western Soc. Eng., 
Jour., vol. 10, no. 2, pp. 131-166, April, 1905. 
201. Distribution of the coal beds of the State [of Illinois].— Illinois State 
Geol. Survey, Bull. no. 3, pp. 19-25, 1 pi., 1906. 
Discusses the occurrence and mining of the workable coal seams of Illinois. 
202. The Peabody atlas. Shipping mines and coal railroads of the central 
commercial district of the United States, accompanied by chemical, geological. 
and engineering data. Chicago, published by Peabody Coal Company. 1906. 
149 pp., maps and illustrations. 
Contains data regarding the coal fields of the United Stntes, and the occurrence, 
character, and composition of the coals. 
Benge, Elmer, and Wherry, Edgar T. 
203. Directory of the mineral localities in and around Philadelphia. -Min 
eral Collector, vol. 12, pp. 1-3, 49-51, 65-67, 89-91, 105-107, L19 L21, 139 L42; 
vol. 13, pp. 7-10, 21-24. 41-43, 00-62, 65-67, 91 93, 109-111, 12!» 132, L51 L54, 
1906; vol. 13, pp. 161-163, 183-184, 1907; vol. 14. pp. 5-7, 25-27. 12, 1907. 
Bensley, B. Arthur. 
204. The homologies of the stylar cusps in the upper molars of the Didel- 
phyidte. — Toronto Univ., Studies, Biological Series no. 5, pp. 1 13, I 1 17 159], 
1906. 
