BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 151 
Pirsson, Louis V., and Washington, Henry S. — Continued. 
1935. Contributions to the geology of New Hampshire: No. Ill, on Red 
Hill, Moultonboro. — Am. Jour, feci., 4th ser., vol. 23, pp. 257-276, April, pp. 
433-447, June, 1907. 
Describes the general geology of the Red Hill in Moultonboro, New Hampshire, and 
the occurrence and relations of the intrusive rocks and their petrographic characters and 
composition. 
Place, A. E., and Elton, H. L. 
1936. Mines of the Taviche district, Oaxaca, Mexico. — Eng. and Min. Jour., 
vol. 84, pp. 625-626, October 5, 1907. 
Includes notes on the geology and the occurrence and character of the silver ores. 
Plate, H. R. 
1937. The old camp at Ward, Nevada. — Min. and Sci. Press, vol. 94, p. 281, 
March 2, 1907. 
Gives notes on the local geology and the occurrence of the ores. 
Plotts, William. 
1938. Nature's wonderful laboratory. — The Humanitarian Review, vol. 5, 
no. 11, pp. 408-414, 1 fig., November, 1907. 
Discusses the origin of coal and petroleum. 
Poole, Henry S. 
1939. [Report on] the Nanaimo-Comox coal field. — Canada, Geol. Survey, 
Summ. Rept. for 1905, pp. 55-59, 1906; British Columbia, Ann. Rept. Minister 
of Mines, for 1906, pp. 204-206, 1907. 
Gives various data regarding the occurrence of coals in this region. 
1940. On the age of the conglomerate capping the Cambrian rocks of Nova 
Scotia.— Nova Scotian Inst. Sci., Trans., vol. 11, pt. 2, pp. 236-244, 1906 . 
Describes the stratigraphic position and relations of the conglomerate aud discusses 
its age. 
1941. Subsidence of the Atlantic coast of Nova Scotia. — Nova Scotian Inst. 
Sci., Trans., vol. 11, pt. 2, pp. 262-263, 1906. 
Discusses the question whether there has been recent subsidence of the coast of Nova 
Scotia. 
1942. Features of the continental shelf off Nova Scotia. — Canada, Roy. Soc, 
Proc. and Trans., 2d ser., vol. 12, sect. 4, pp. 67-S2, 1 pi. (map), 1906. Abstract : 
Science, new ser., vol. 23, p. 972, June 29, 1906. 
1943. The barytes deposits of Lake Ainslie and North Chetieamp, N. S., with 
notes on the production, manufacture, and use of barytes in Canada. — Geol. 
Survey of Canada, Ottawa, 1907. 43 pp. 
Porter, John T. 
1944. Properties and tests of fullers earth. — U. S. Geol. Survey, Bull., no. 315, 
pp. 26S-290, 1907. 
Describes the zoology, origin, and composition. 
Pratt, Joseph Hyde. 
1945. Arizona asbestos deposits. — Min. World, vol. 23, no. 1, p. 17, July 8, 
190.-). 
1946. The graphite industry.— Min. World, vol. 23, no. 3, pp. 64-66, July 22, 
1905. 
Includes notes on the occurrence of graphite deposits. 
1947. Corundum and its occurrence and distribution in the United States. — 
U. S. Geol. Survey, Bull. no. 269, 175 pp., is pis., 26 figs., 1900. 
A revised and enlarged edition of Bulletin no. 180, U. S. Geol. Survey. 
