22 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, [bull.203. 
99 Byrne (P.). Marble formations of the Cahaba River, Alabama. 
Eng. and Mg. Jour., vol. 72, p. 400, 1901. 
Describes the general character and distribution of the marble. 
C. 
100 Calvin (Samuel). Geology of Page County [Iowa]. 
Iowa Geol. Surv., vol. 11, pp. 400-460, figs. 28-37, and map, 1901. 
Describes the physiography, the character and occurrence of the Car- 
boniferous, Cretaceous and Pleistocene strata, and the occurrence of 
economic products. 
101 Concerning the occurrence of gold and some other mineral 
products in Iowa. 
Am. Geol., vol. 27, pp. 363-372, 1901. 
Describes the origin and occurrence of various minerals and notes 
some of the popular fallacies that are held concerning them. 
10^ Campbell (Douglas H.). [Review of " Studios in fossil botany," 
by 1). H. Scott.] 
Am. Nat., vol. 35, pp. 73-77, L901. 
103 Campbell (John T.). Evidence of a local subsidence in the inte- 
rior [Indiana]. 
Jour. Geol., vol. 9, pp. 437-438, 1901. 
Difference in Levelings made in L883 and in 1901 show a subsidence in 
Parke ( ounty. Indiana. 
1<>4 Campbell (Marius R.). Hypothesis to account for the extra- 
Glacial abandoned valleys of the Ohio Basin. 
Abstracts: Geol. Soc. Am., Bull., vol. 12, p. 462 (\ p.), 1901. 
Science, new scr.. vol. 13, pp. 98-99, 1901. 
Discusses their formation as due to formation and persistence of local 
ice dams. 
105 Charleston Folio— West Virginia. 
T. S. Geol. Surv., Geol. Atlas of U. S., Folio No. 72, 1901. 
Describes the geographic and topographic features of the region, the 
stratigraphy, the character and occurrence of the Carboniferous and 
Pleistocene strata, the geologic structure, and the mineral resources of 
the quadrangle. 
106 Carter (O. S. C). Artesian wells as a water supply for Phila- 
delphia. 
Franklin Inst., Jour., Jan., 1893. (Not seen.) 
107 Artesian wells. 
Franklin Inst., Jour., Sept., 1893. (Not seen.) 
108 Anthracite coal near Perkiomen Creek. 
Franklin Inst., Jour., August, 1894. (Not seen.) 
109 - - Drilling for oil and natural gas in the vicinity of Philadelphia. 
Franklin Inst., Jour., Sept., 1894. (Not seen.) 
