IV ADVEKTISEMENT. 



PP 35.-Geology of the Perry basin in southeastern Maine, by G. O. Smith and David White. 1905. 



pp. ,6 pis. 



B 243. Cement materials and industry of the United States, by E. C. Eckel. 1905. pp., 15 pis. 



B 246. Zinc and lead deposits of northeastern Illinois, by H. F. Bain. 1904. 56 pp., 5 pis. 



B 247. The Fairhaven gold placers of Seward Peninsula, Alaska, by F. H. Moffit. 1905. pp., 14 pis. 



B 249. Limestones of southwestern Pennsylvania, by F. G. Clapp. 1905. pp., 7 pis. 



B 250. The petroleum fields of the Pacific coast of Alaska, with an account of the Bering River coal 



deposit, by G. C. Martin. 1905. pp., 7 pis. 

 B 251. The gold placers of the Fortymile, Birch Creek, and Fairbanks regions, Alaska, by L. M. 



Prindle. 1905. pp., 16 pis. 

 WS 118. Geology and water resources of a portion of east-central Washington, by F. C. Calkins. 1905. 



pp., 4 pis. 



B 252. Preliminary report on the geology and water resources of central Oregon, by I. C. Russell. 



1905. pp., 24 pis. 

 PP 36. The lead, zinc, and fluorspar deposits of western Kentucky, by E. O. Ulrich and W. S. Tangier 



Smith. 1905. pp., pis. 

 PP 38. Economic geology of the Bingham mining district of Utah, by J. M. Boutwell, with a chapter 



on areal geology, by Arthur Keith, and an introduction on general geology, by S. F. Emmons. 



1905. pp., pis. 

 PP 41. The geology of the central Copper River region, Alaska, by W. C. Mendenhall. 1905. pp., 



-pis. 

 B 254. Report of progress in the geological resurvey of the Cripple Creek district, Colorado, by Wai- 



demar Lindgren and F. L. Ransome. 1904. 36 pp. 



Correspondence should be addressed to 



THE DIRECTOR, 



UNITED STATES GEOLOGICAL SURVEY, 



WASHINGTON, D. 0. 

 DECEMBER, 1904. 



