II ADVERTISEMENT. 
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. C. Mendenhall am 
F. C. Schrader. 1903. 71 pp., 10 pis. 
B 218. Coal resources of the Yukon, Alaska, by A. J. Collier. 1903. 71 pp., G 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 northern 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. 
B 223. Gypsum deposits of the United States, by G. I. Adams and others. 1904. 129 pp., 21 pis. 
PP 24. Zinc and lead deposits of northern Arkansas, by G. I. Adams. 1904. 118 pp., 27 pis. 
PP 2."i. Copper deposits of the Encampment district, Wyoming. Colorado, by A. C. Spencer. 190-3 
107 pp., 2 pis. 
B 22."). Contributions to economic geology, 1903; S. F. Emmons, <\ W. Hayes, geologists in chargt 
1904. 527 pp.. 1 pi. 
PP 26. Economic resources of the northern Black Hills, by .). I). Irving, with contributions by S. J 
Emmons and T. A. Jaggar, jr. 1904. 222 pp., 20 pis. 
PP27. A. geological reconnaissance across the Bitterroot Range and Clearwater Mountains in Mor 
tana and Idaho, by Waldemar Lindgren. 1904. 123 pp., 15 pis. 
B229. Tin deposits of the York region, Alaska, by A. J. ('oilier. 1901. til 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 Iola quadrangle, Kansas, by G. I. Adams, Erasmus Havvorth, an 
W. R. Crane. 1904. 83 pp., 11 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. Foster Bain. 1904. 56 pp., 5 pis. 
B 247. The Fairhaven gold placers, Seward Peninsula, Alaska, by F. H. Moffit. 1905. 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 cor 
deposits, by G. C. Martin. 190"). 65 pp., 7 pis. 
B 251. The gold placers of the Fortymile. Birch Creek, and Fairbanks regions, Alaska, by L. IV 
Prindle. L905. 89 pp., 16 pis. 
Ws 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. 0. Ulrich and W. S. ' 
Smith. 1905. 218 pp.. 15 pis. 
PP 38. Economic geology of the Bingham mining district of Utah, by J. M. Boutwell, with a chapti 
on areal geology, by Arthur Keith, and an introduction on general geology, by S. ] 
Emmons. 1905. — pp., 49 pis. 
PP 41. The geologv of the central Copper River region, Alaska, by W. C. Mendenhall. 1905. — p] 
-pis. 
B 254. Report of progress in the geological resurvey of the Cripple Creek district, Colorado, by Wald 
mar Lindgren and F. L. Ransome. 1904. 36 pp. 
B 255. The fluorspar deposits of southern Illinois, by H. Foster Bain. 1905. 75 pp., 6 pis. 
H 256. Mineral resources of the Elders Ridge quadrangle, Pennsylvania, by R. W.Stone. 1905. — pi 
-pis. 
B 259. Report on progress of investigations of mineral resources of Alaska in 1904, by A. H. Broo! 
and others. 1905. 196 pp., 3 pis. 
B 260. Contributions to economic geology, 1904, S. F. Emmons and C. W. Hayes, geologists in charg 
1905. —pp.,— pis. 
B 261. Preliminary report on the operations of the coal-testing plant of the United States Geologic 
Survey at the Louisiana Purchase Exposition, St. Louis, Mo., 1904; E. W. Parker, J. A. Holnu 
and M. R. Campbell, committee in charge. 1905. 172 pp. 
B 263. Methods and cost of gravel and placer mining in Alaska, by C. W. Purington. 1905. 
PP 42. Geology of the Tonopah mining district, Nevada, by J. E. Spurr. 1905. 
PP 43. The copper deposits of Clifton-Morenci, Arizona, by Waldemar Lindgren. 1905. 
B264. Record of deep well drilling for 1904, by M. L. Fuller, E. F. Lines, and A. C. Veatch. 19( 
106 pp. 
Series O— Underground Waters. 
WS 4. A reconnaissance in southeastern Washington, by I. C. Russell. 1897. 96 pp., 7 pis. 
WS 6. Underground waters of southwestern Kansas, by E. Haworth. 1897. 65 pp., 12 pis. 
WS 7. Seepage waters of northern Utah, by Samuel Fortier. 1*97. 50 pp., 3 pis. 
Ws 12. Underground waters of southeastern Nebraska, by N. H. Darton. 1898. 56 pp., 21 pis. 
WS 21. Wells of northern Indiana, by Frank Leverett. L899. 82 pp., 2 pis. 
