IV SERIES LIST. 
B304. Oil and gas fields of Greene County, Pa., by Ralph W. Stone and Frederick G. Clapp. 1906. 
110 pp., 3 pis. 
PP 56. Geography and Geology of a portion of southwestern Wyoming, with special reference to co 
and oil, by A. C. Veatch. 1907. —pp., 26 pis. 
B 308. A geologic reconnaissance in southwestern Nevada and eastern California, by S. II. Ball. 1907. 
218 pp., 3 pis. 
B 309. The Santa Clara Valley, Puente Hills, and Los Angeles oil districts, southern California, by 
G. H. Eldridge and Ralph Arnold. 1907. 266 pp., 41 pis. 
B 312. The interaction between minerals and water solutions, with special reference to geologic 
phenomena, by E. C. Sullivan. 1907. 69 pp. 
B 313. The granites of Maine, by T. Nelson Dale, with an introduction by G. O. Smith. 1907. — pp 
14 pis. 
B 314. Report of progress of investigations of mineral resources of Alaska in 1906, by A. H. Brool 
and others. 1907. 235 pp., 4 pis. 
Correspondence should be addressed to 
The Director, 
United States Geological Survey, 
Washington, D. C. 
May, 1907. 
