Geology and Natural History. 281 



No. 188. Tallula-Springfield Folio, Illinois; by E. W. Shaw 

 and T. E. Savage. Pp. 12; 2 colored maps, topography and 

 geology. 



No. 189. Barnesboro-Patton Folio, Pennsylvania; by Marius 

 R. Campbell, Frederick G. Clapp, Charles Butts. In co- 

 operation with the State of Pennsylvania. Pp. 13; 3 maps, 

 topography and geology, 1 1 figs. 



No. 190. Niagara Folio, New York; by E. M. Kindle and 

 Frank B. Taylor. Pp.26; 4 maps, topography and geology, 

 3 pages of illustrations with 25 plates. 



Professional Papers. —No. 76. The San Franciscan Volcanic 

 Field, Arizona; by Henry H. Robinson. Pp. 213; 14 pis., 36 

 figs. See notice on p. 202, February number. 



No. 85-B. The Mud Lumps at the Mouths of the Mississippi; 

 by Eugene W. Shaw. Pp. 11-27; 3 pis. 6 figs. 



No. 85-C. Interpretation of Anomalies of Gravity; by Grove 

 K. Gilbert. Pp. 29-37; one plate, one figure. 



Mineral Resources for the United States in 1912, numerous 

 advance chapters. 



Bulletins. — No. 531. Contributions to Economic Geology, 

 1911. Part II, Mineral Fuels. Marius R. Campbell, Geologist 

 in charge. Pp. 361; 24 pis., 10 figs. 



No. 536. The Noatak-Kobuk Region, Alaska; by Philip S. 

 Smith. Pp. 160; 15 pis., one fig. 



No. 538. A Geologic Reconnaissance of the Circle Quad- 

 rangle, Alaska; byL. M. Prindle. Pp. 82; 13 pis., 2 figs. 



No. 539. Some Ore Deposits in Northwestern Custer County, 

 Idaho; by Joseph B. Umpleby. Pp. 104; 10 pis., 4 figs. 



No. 542. Mineral Resources of Alaska: Report on Progress of 

 Investigations in 1912; by Alfred H. Brooks and others. Pp. 

 308, 10 pis., 7 figs. 



No. 545. Bibliography of North American Geology for 1912, 

 with subject index; by John M. Nickles. Pp. 192. 



No. 555. Results of Spirit Leveling in Indiana 1897 to 1911, 

 inclusive. R. B. Marshall, Chief Geographer. Pp. 51. 



Water-Supply Papers. — No. 295. Gazetteer of Surface 

 Waters of California, Part I. Sacramento River Basin. Pre- 

 pared under the direction of John C. Hoyt, by B. D. Wood. 

 Pp. 99. Washington, 1912. 



Nos. 302, 303. Surface Water Supply of the United States 

 1911, prepared under the direction of M. O. Leighton. No. 302, 

 Part II. South Atlantic Coast and Eastern Gulf of Mexico 

 Drainage Basins; by M. R. Hall and C. H. Pierce. Pp. 90, 4 

 pis. No. 303, Part III. The Ohio River Basin; by A. H. 

 Horton, M. R. Hall, and H. J. Jackson. Pp. 112; 4 pis. 



No. 319. Geology and Ground Waters of Florida; by George 

 C. Matson and Samuel Sanford. Pp. 445; 17 pis., 7 figs. 



No. 320. Geology and Water Resources of Sulphur Spring 

 Valley, Arizona; by O. E. Meinzer and F. C. Kelton, with a 

 section on Agriculture by R. H. Forbes. Pp. 231; 15 pis. and 

 32 ficrs. 



