BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 161 
Robertson, William Fleet. 
2072. Report of [British Columbia] Bureau of Mines. — British Columbia, 
Ann. Rept. Minister of Mines, for 1904, Victoria, B. C, 1905. 317 pp., pis. and 
maps. 
Includes notes on the geology and on the occurrence of ores in British Columbia. 
2073. Report of LBritish Columbia] Bureau of Mines. — British Columbia, 
Ann. Rept. Minister of Mines, for 1905, Victoria, B. C, 1906. 273 pp., pis. and 
maps. 
Includes notes on the geology and on the occurrence of ores in British Columbia. 
2074. The northern interior plateau lying between the Fraser and Skeena 
rivers. — British Columbia, Ann. Kept. Minister of Mines, for 1905, pp. 89-137, 
,1906. 
Includes notes upon the geology of the region, and the occurrence and character of 
coal beds, and the quality of the coals. 
2075. Windy Arm mineral locations. — Eng. and Min. Jour., vol. 81, pp. 701- 
704, 2 figs., April 14, 1906. 
Describes mineral developments in the northern part of British Columbia. 
2076. Do the geological relations of ore deposits justify the retention of the 
law of the apex?— Econ. Geology, vol. 1, no. 8, pp. 809-810, 1906. 
2077. Report of [British Columbia] Bureau of Mines. — British Colunjbia, 
Ann. Rept. Minister of Mines, for 1906, Victoria, B. C, 1907. 277 pp., pis. 
and maps. 
Includes notes on the geology and the occurrence of ores in British Columbia. 
Robinson, Henry Hollister. 
2078. The Tertiary peneplain of the plateau district, and adjacent country, 
in Arizona and New Mexico. — Am. Jour. Sci., 4th ser., vol. 24, pp. 109-129, 5 figs., 
August, 1907. 
Preliminary geological map of Connecticut. — See Gregory and Robinson, no. 
1038. 
Robles, R. 
2079. Etude miniere de la " Veta Colorado " de Minas Nuevas a. Hidalgo del 
Parral (Etat de Chihuahua). — X° Congr. geol. intern., Guide des Excursions, 
Mexico, no. XXII, 15 pp., 1 pi., 1906. 
Describes the character, occurrence, relations, and origin of the ore deposits. 
Etude de la Sierra de Guanajuato. — See Villarello, Flores, and Robles, no. 
2460. 
Roel, F., and Ordonez," E. 
2080. Analisis quimico de la chiluca y de la cantera. — Soc. Geol. Mexicana. 
Bol., t. 2, pp. 47-50, 1906. 
Describes the occurrence and composition of some building stones. 
Rogers, Austin Flint. 
2081. Minerals of the Galena-.Ioplin lead and zinc district. — Kansas Univ. 
Geol. Survey, vol. 8, pp. 445-509, 14 pis., 1 fig.. 1904. 
(Jivos descriptions of the minerals with bibliography of publications relating to them, 
and discusses their paragenesis. 
2082. The determination of minerals in crushed fragments by means of the 
polarizing microscope. — School of Mines Quart., vol. 27, no. 3, pp. 340-359, 1 pi., 
3 figs., April, 1906. 
Includes an alphabetic list of minerals with their microscopic and optical characters 
as observed with the polarizing microscope. 
2083. Some points in teaching crystallography. — Science, now ser., vol. 24, 
PP. 620-621, November 16, 1! ><><;. 
66X36— Hull. 372— 09 11 
