IV ADVERTISEMENT. 



PP 34. Delavan lobe of the Lake Michigan glacier of the Wisconsin stage of glaziation and associated 



phenomena, by W. C. Alden. 1904. 106 pp., 15 pis. 

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



107 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 northwestern Illinois, by H. F. Bain. 1904. 56 pp., 5 pis. 

 B 247. The Fairhaven gold placers, Seward Peninsula, Alaska, by F. H. Mofiit. 1905. 85 pp., 14 pis. 

 B 249. Limestones of southwestern Pennsylvania, by F. G. Clapp. 1905. • 52 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 Forty Mile, Birch Creek, and Fairbanks regions, Alaska, by L. M. 



Prindle. 1905. 89 pp., 16 pis. 

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



96 pp., 4 pis. 

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



1905. 138 pp., 24 pis. 

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



Smith. 1905. —pp., 15 pis. 

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



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



190.5. —pp.,— pis. 

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



-pis. 

 B264. Report of progress in the geological resurvey of the Cripple Creek district in 1903-4, by Wal- 



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

 B 255. The flourspar deposits of southern Illinois, by H. Foster Bain. 1905. 75 pp., 6 pis. 



Correspondence should be addressed to 



The Director, 



United States Geological Scrvey, 



Washington, D. C. 

 February, 1905. 



