II ADVERTISEMENT. 



PP 1. Preliminary report on the Ketehikan mining district, Alaska, with an introductory sketch of the geology of south 



eastern Alaska, by Alfred Hulse Brooks. 1902. 120 pp., 2 pis. 

 B 200. Reconnaissance of the borax deposits of Death Valley and Mohave Desert. l>y M. R. Campbell. 1902. 23 pp., 1 pi 



(Out of stock.) 



B 202. Tests for gold and silver in shales from western Kansas, by Waldemar l.imlpivn. 1902. 21 pp. 

 PP 2. Reconnaissance of the northwestern portion of Seward Peninsula, Alaska, by A. J. Collier. 1902. 70 pp., 11 pis. 

 PP 10. Reconnaissance from Fort Hamlin to Kotzebue Sound. Alaska, by way of Pall, Kanuti, Allen, 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. Rnnsome. 1903. 168 pp., 27 pis. 



B 212. Oil fields of the Texas-Louisiana Gnlf 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 \Vrangell district, Alaska, by \V. C. Mendenhall and F. C. Schrader. 1903. 



71 pp., 10 pis. 



B 218. Coal resources of the Yukon, Alaska, by Arthur J. Collier. 1903. 71 pp.. (i pis. 

 B 219. The ore deposits of Tonopah, Nevada (preliminary report), by J. E. Spurr. 1903. 31 pp., 1 pi. 

 PP 20. A reconnaissance in northtrn Alaska in 1901, by F. C. Schrader. 1904. 139 pp., 16 pis. 

 PP 21. Geology and ore deposits of the Bisbee quadrangle, Arizona, by F. L. Ransome. 1904. 168 pp., 29 pis. 

 B223. Gypsum deposits ill the I'nited States, by G. I. Adams and others. 1904. 129 pp., 21 pis. 

 I'P 24. Zinc and lead deposits of northern Arkansas, by G. I. Adams, assisted by A. H. Purdue and E. F. Burchard, with a 



section on the determination and correlation of formations, by E. O. Ulrich. 1904. 118 pp., 27 pis. 

 PP 25. The copper deposits of the Encampment district, Wyoming, by A. C. Spencer. 1904. 107 pp., 2 pis. 

 B 225. Contributions to economic geology, 1903. by S. F. Emmons and C. W. Hayes, geologists in charge. 1904. 527 pp. 1 pi. 

 PP 26. Economic resources of the northern Black Hills, by J. D. Irving, with contributions by S. F. Emmons and T. A. 



Jaggar, jr. 1904. 222 pp., 20 pis. 

 PP27. A geological reconnaissance across the Bitterroot Range and Clearwater Mountains in Montana and Idaho, by 



Waldenmr Liiulgren. 1904. 122 pp. . 15 pis. 



B 229. Tin deposits of the York region, Alaska, by A. J. Collier. 1904. 61 pp., 7 pis. 

 B 236. The Porcupine placer district, Alaska, by C. W. Wright. 1904. 35 pp., 10 pis. 

 B 238. Economic geology of the lola quadrangle. Kansas, by (;. I. Adams, Erasmus Haworth, and W. R. Crane. 1904. 83 



pp., 11 pis. 



B 243. Cement materials and industry of the United States, by E. C. Kckel. 1905. 395 pp., 15 pis. 

 B 246. Zinc and lead deposits of northwestern Illinois, by H. Foster Bain. 1MM. M pp., 5 pis. 

 B 247. The Fairhavcn gold placers, Seward Peninsula. Alaska, by F. II. Mottit. 190ft. 85 pp.. 14 pis. 

 B249. Limestones of southeastern 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 deposits, by G. C. 



Martin. 1905. 64 pp.. 7 pis. 



B251. The gold placers of the Fortymile, Birch Creek, and Fairbanks regions, Alaska, by L. M. Prindle. 1905. 89 pp., 16 pis. 

 \\S 117. The lignite of North Dakota and its relation to irrigation, by F. A. Wilder. 1905. 59 pp., 8 pis. 

 PP 36. The lead, zinc, and fluorspar deposits of western Kentucky, by E. (). Ulrich and W. S. T. Smith. 1905. 218 pp., 15pls. 

 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. 413 pp., 49 pis. 

 PP 41. The geology of the central Copper River region, Alaska, by W. C. Mendenhall. 1906. 

 B 254. Report of progress in the geological resurvey of the Cripple Creek district, Colorado, by Waldemar Lindgren and 



F. L. Kiinsome. 1904. 36 pp. 



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

 B 256. Mineral resources of the Elders Ridge quadrangle, Pennsylvania, by R. W. Stone. 1905. 86 pp., 12 pis. 

 B 259. Report on progress of investigations of mineral resources of Alaska in 1904, by A. H. Brooks and others. 1905. 



196 pp., 3 pis. 



B 260. Contributions to economic geology, 1904; S. F. Emmons, C. W. Hayes, geologists in charge. 1905. 620 pp., 4 pis. 

 B 261. Preliminary report on the operations of the coal-testing plant of the United states Geological Survey at the Louisiana 



Purchase Exposition, St. Louis, Mo., 1904; E. W. Parker, J. A. Holmes. M. R. Campbell, committee in charge. 1905. 



172 pp. 



B 26S. Methods and costs of gravel and placer mining in Alaska, by C. W. Purington. 1905. 27:1 pp., 42 pis. 

 PP 42. Geology of the Tonopah mining district. Nevada, by J. E. Spurr. 1906. 295 pp., -Jl |.K 



SERIES B. DESCRIPTIVE GEOLOGY. 



B23. Observations on the junction between the Eastern sandstone and the Kcwceiiaw series on Kcweenaw Point, Lake 



Superior, by K. D. Irving and T. C. Chamberlin. 1885. 124 pp., 17 pis. (Out of stock.) 

 B 33. Notes on geology of northern California, by J.S. Dillcr. 1886. 23pp. (Out of stork.) 



B 39. The upper beaches and deltas of Glacial Lake Agassiz, by Warren Upham. 1887. 84 pp., 1 pi. (Out of stock.) 

 B 40. Changes in river courses in Washington Territory due to glaciation, by Hailey Willis. 1887. 10 pp., 4 pis. (Out of 



Ktock.) 



B 45. The present condition of knowledge of the geology of Texas, by R. T. Hill. 1887. 94 pp. (Out of stock.) 

 B 53. The geology of Nantucket, by N. 8. Shaler. 1889. 55 pp., 10 pis. (Out of stock.) 

 B 57. A geological reconnaissance in southwestern Kansas, by Robert Hay. 1890. 49 pp., 2 pis. 



K >. The glacial txmndary in western Pennsylvania, Ohio, Kentucky. Indiana, and Illinois, by G. F. Wright, with intro- 

 duction by T. C. Chamberlln. 1890. 112pp., 8 pis. (Out of stock.) 



