II ADVERTISEMENT. 
PP 10. Reconnaissance from Fort Hamlin to Kotzebue Sound, Alaska, by way of Dall. Kanuti, Allen, I 
and Kowak rivers, by W. C. Mendenhall. 1902. 68 pp., 10 pis. 
PP 11. Clays of the United States east of the Mississippi River, by Heinrich Ries. 1903. 298 pp., 9 pis. 
PP 12. Geology of the Globe copper district, Arizona, by F. L. Ransome. 1903. 168 pp., 27 pis. 
B 212. Oil fields of the Texas-Louisiana Gulf Coastal Plain, by C. W. Hayes and William Kennedy. 
1903. 174 pp., 11 pis. 
B 213. Contributions to economic geology, 1902; S. F. Emmons, C. W. Hayes, geologists in charge. \ 
1903. 449 pp. 
PP 15. The mineral resources of the Mount Wrangell district, Alaska, by W. <'. Mendenhall and 
F. C. Schrader. 1903. 71 pp., 10 pis. 
B 218. Coal resources of the Yukon, Alaska, by A. .1. Collier. 1903. 71 pp.. 6 pis. 
Correspondence should be addressed to 
The Director, 
United States Geological Survey, 
Washington, D. C. 
I >i:( embek, 1903. 
