364: Scientific Intelligence. 



No. 390. Geology of the Lewistown Coal Field, Montana ; by 

 W. R. Calvert. Pp. 83, 5 plates, 1 figure. 



No. 396. Paleontology of the Coalinga District, Fresno and 

 Kings Counties, California ; by Ralph Arnold. Pp. 173, 30 

 plates. 



No. 397. Mineral Deposits of the Cerbat Range, Black 

 Mountains and Grand Wash Cliffs, Mohave County, Arizona; 

 by F. C. Schrader. Pp. 226, 16 plates, 37 figures. 



No. 400. Iron Ores, Fuels, and Fluxes of the Birmingham 

 District, Alabama ; by Ernest F. Burchard and Charles 

 Butts. With Chapters on the Origin of the Ores ; by Edwin C. 

 Eckel. Pp. 204, 17 plates, 19 figures. 



No. 404. The Granites of Vermont ; by T. Nelson Dale. 

 Pp. 138, 5 plates, 25 figures. 



No. 405. The Mercury Minerals from Terlingua, Texas ; by 

 W. F. Hillebrand and W. T. Schaller. Pp. 174, 6 plates, 44 

 figures. 



No. 408. A Reconnaissance of Some Mining Camps in Elko, 

 Lander and Eureka Counties, Nevada ; by William H. Emmons. 

 Pp. 130, 5 plates, 22 figures. 



No. 409. Bibliography of North American Geology for 1908, 

 with subject index; by John M. Nickles. Pp. 148. 



No. 410. The Innoko Gold-Placer District, Alaska, with 

 accounts of the Central Kuskokwim Valley and the Ruby Creek 

 and Gold Hill Placers ; by A. G. Maddren. Pp. 87, 5 plates. 



No. 411. Results of Spirit Leveling in Ohio, 1898 to 1908, 

 inclusive ; compiled by S. S. Gannett and D. H. Baldwin. Work 

 done in cooperation with the State of Ohio during 1901 to 1908, 

 inclusive. Pp. 147. 



No. 412. Tests of Run-of-Mine and Briquetted Coal in a Loco- 

 motive Boiler ; by Walter T. Ray and Henry Kreisinger. 

 Pp. 31, 9 figures. " 



No. 413. A Reconnaisance of the Gypsum Deposits of Cali- 

 fornia ; by Frank L. Hess, with a Note on Errors in the Chem- 

 ical Analysis of Gypsum ; by George Steiger. Pp. 36, 4 plates, 

 2 figures. 



No. 414. Notes on Some Mining Districts in Humboldt 

 County, Nevada; by Frederick Leslie Ransome. Pp. 75, 1 

 plate, 7 figures. 



No. 416. Recent Development of the Producer-Gas Power 

 Plant in the United States ; by Robert Heywood Fernald. 

 Pp. 82, 2 plates, 3 figures. 



No. 418. The Fire Tax and Waste of Structural Materials in 

 the United States ; by Herbert M. Wilson and John L. Cock- 

 rane. Pp. 30. 



No. 421. Results of Spirit Leveling in Illinois 1896 to 1908, 

 inclusive ; compiled by S. S. Gannett and D. H. Baldwin, in 

 cooperation with the Illinois State Geological Survey during 

 1905 to 1908, inclusive. Pp. 74. 



No. 423. A Primer on Explosives for Coal Mines. By 



