n ADVERTISEMENT. 
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 and 
F. C. Schrader. 1903. 71 pp., 10 pis. 
B 218. Coal resources of the Yukon, Alaska, by A. J. Collier. 1903. 71 pp., 6 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 25. Copper deposits of the Encampment district, Wyoming-Colorado, by A. C. Spencer. 1904. 
107 pp., 2 pis. 
B 225. Contributions to economic geology, 1903; S. F. Emmons, 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. 
PP 27. A geological reconnaissance across the Bitterroot Range and Clearwater Mountains in Mon- 
tana and Idaho, by Waldemar Lindgren. 1904. 123 pp., 15 pis. 
B229. 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 Iola quadrangle, Kansas, by G. 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. 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. 
B 249. 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. — pp., 7 pis. 
B 251. The gold placers of the Fortymile, Birch Creek, and Fairbanks regions, Alaska, by L. M. 
Prindle. 1905. 89 pp., 16 pis. 
SERIES B, DESCRIPTIVE GEOLOGY. 
B 23. Observations on the junction between the Eastern sandstone and the Keweenaw series on 
Keweenaw Point, Lake Superior, by R. D. Irving and T. C. Chamberlin. 1885. 124 pp., 
17 pis. 
B 33. Notes on geology of northern California, by J. S. Diller. 1886. 23 pp. (Out of stock.) 
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 Bailey Willis. 1887. 
10 pp., 4 pis. (Out of stock.) 
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. S. Shaler. 1889. 55 pp., 10 pis. (Out of stock.) 
B ~>7. A geological reconnaissance in southwestern Kansas, by Robert Hay. 1890. 49 pp., 2 pis. 
B 58. The glacial boundary in western Pennsylvania, Ohio, Kentucky, Indiana, and Illinois, by G. F. 
Wright, with introduction by T. C. Chamberlin. 1890. 112 pp., 8 pis. (Out of stock.) 
B 67. The relations of the traps of the Newark system in the New Jersey region, by N. H. Darton. 
1890. 82 pp. (Out of stock.) 
B 104. Glaciation of the Yellowstone Valley north of the Park, by W. H. Weed. 1893. 41 pp., 4 pis. 
B 108. A geological reconnaissance in central Washington, by I. C. Russell. 1893. 108 pp., 12 pis. 
(Out of stock.) 
B 119. A geological reconnaissance in northwest Wyoming, by G. H. Eldridge. 1894. 72 pp., 4 pis. 
B 137. The geology of the Fort Riley Military Reservation and vicinity, Kansas, by Robert Hay. 
1896. 35 pp., 8 pis. 
B 144. The moraines of the Missouri Coteau and their attendant deposits, by J. E. Todd. 1896. 71 
pp., 21 pis. 
B 158. The moraines of southeastern South Dakota and their attendant deposits, by J. E. Todd. 
1899. 171 pp., 27 pis. 
B 159. The geology of eastern Berkshire County, Massachusetts, by B. K. Emerson. 1899. 139 pp., 
9 pis. 
B 165. Contributions to the geology of Maine, by H. S. Williams and H. E. Gregory. 1900. 212 pp., 
11 pis. 
WS 70. Geology and water resources of the Patrick and Goshen Hole quadrangles in eastern 
Wyoming and western Nebraska, by C. I. Adams. 1902. 50 pp., 11 pis. 
B 199. Geology and water resources of the Snake River Plains of Idaho, by I. C. Russell. 1902. 192 
pp., 25 pis. 
