76 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 
Ford, James. 
887. Theory of the formation of coal fields. — Eng. and Min. Jonr., vol. 82, 
pp. 255-256, August 11, 1906. 
Ford, W. E. 
888. Some interesting beryl crystals and .their associations. — Am. Jour. Sci., 
4th ser., vol. 22, pp. 217-223, 10 figs., September. 1906; Zeitschr. f. Krystal, u. 
Mineral., Bd. 43, Heft 1, pp. 12-17, 11 figs., 1907. 
On stibiotantalite.— See Penfield and Ford, no. 1892. 
Forstner, William. 
889. Copper in Shasta County, California. — Min. and Sci. Press, vol. 94, pp. 
625-626, 4 figs.. May 18, 1907. 
Discusses the geology of the Shasta copper belt and the occurrence and character of 
the ores. 
890. Ore deposits in serpentine. — Min. and Sci. Press, vol. 95, pp. 121-122, 
July 27. 1907. 
Fowke, Gerard. 
891. Superficial deposits along the Mississippi. — Ohio State Acad. Sci., Proc, 
vol. 4, pt. 7 (14th Ann. Kept.), pp. 349-352, 1906. 
Discusses the occurrence of glacial deposits in southern Illinois and Missouri and 
their explanation. 
892. Lansing man. — Bureau Am. Ethnology, Hull., vol. 30, pt. 1, pp. 759- 
760, 2 figs., 1907. 
Discusses the occurrence of the human remains and the geologic environment, and 
discusses the age of the deposits. 
Fraleck, E. L. 
893. Iron pyrites in Ontario. — Ontario, Bur. Mines, 16th Ann. Kept., vol. 16, 
pt. 1, pp. 149-201, 21 figs., 1907. 
Frank, Fritz J. 
894. Cobalt: Canada's wonderful silver camp; geological features of the 
region. — Mines and .Minerals, vol. 27, no. 4, pp. 145-147. 5 figs., November, 1906. 
Fraprie, Frank Roy. 
895. On the chromates of csesium. — Am. Jour. Sci.. 4th ser., vol. 21, pp. 309- 
316, 5 figs., April, 1906; Zeitschr. f. Kryst. u. Mineral., Bd. 42, Heft 2, pp. 113- 
119, 5 figs.. 1906. 
Fraser, Lee. 
896. Coal mining in Michigan. — Eng. and Min. Jour., vol. 84, pp. 594-595, 
2 figs., September 28, 1907. 
897. Mining the coal measures of Michigan. — Eng. and Min. Jour., vol. 84, 
pp. 1024-1027, 9 figs., November 30, 1907. 
Includes notes on the occurrence, character, and composition of the coals. 
Frazer, Persifor. 
898. Rocks of Mount Desert Island, Maine. — Geol. Soc. America, Bull., vol. 
16, pp. 583-585, 1906. 
899. The classification of coals. Discussion of paper by M. R. Campbell. — 
Am. Inst. Min. Eng., Trans., vol. 36, pp. 825-833, 1906 (Bi-Mo. Bull. no. 8, pp. 
239-246, March, 1906). 
Freeh, Fritz. 
900. Ueber die Klima-aenderungen der geologischen Vergangenheit. — Congr. 
geol. intern., C. R. 10 e sess., Mexico, 1906, pp. 299-325, 1907. 
Discusses geologic changes of climate. 
