Geology and Mineralogy. 63 



No. 474. Coals of the State of Washington ; by E. Eggle- 

 ston Smith. Pp. 206 ; 8 plates. 



No. 478. Geology and Ore Deposits near Lake City, Colorado ; 

 by John D. Irving and Howland Bancroft. Pp. 128 ; 8 

 plates, 33 figures. 



No. 483. Economic Geology of Richmond, Virginia, and 

 Vicinity ; byN. H. Darton. Pp. 48 ; 10 plates, 1 figure. 



No. 484. The Granites of Connecticut ; by T. Nelson Dale 

 and Herbert E. Gregory. Prepared in cooperation with the 

 Geological and Natural History Survey of Connecticut. Pp. 137; 

 7 plates, 12 figures. 



Nos. 486, 487, 488, 489. Results of Spirit Leveling ; R. B. 

 Marshall, Chief Geographer. No. 486. In Colorado, 1896-1910. 

 Pp. 107, 1 plate. No. 487. In Idaho, 1896-1909. Pp. 46,1 

 plate. No. 488. In Nevada, 1897-1909. Pp. 28, 1 plate. No. 

 489. In Utah, 1897-1910. Pp. 38, 1 plate. 



No. 490. Mineralogical Notes. Series I ; by Waldemar T. 

 Schaller. Pp. 109 ; 14 figures. 



No. 491. The Data of Geochemistry. Second Edition ; by 

 Frank W. Clarke. Pp. 782. 



No. 495. Bibliography of North American Geology for 1910, 

 with subject index ; by John M. Nickles. Pp. 179. 



Water Supply Papers — No. 239. The quality of the Sur- 

 face Waters of Illinois ; by W. D. Collins. Pp. 94 ; 3 plates. 



Nos. 261, 269, 271, 272, 288. Surface Water Supply of the United 

 States, 1909. Prepared under the direction of M. O. Leighton. 

 No. 261, Part I. North Atlantic Coast; by H. K. Barrows, C. 

 C. Covert, R. H. Bolster. Pp. 309 ; 5 plates, 1 figure. No. 

 269. Part IX, Colorado River Basin ; by W. B. Freeman 

 and R. H. Bolster. Pp. 247 ; 9 plates, 1 figure. No. 271. 

 Part XI, California ; by W. B. Clapp and F. F. Henshaw. Pp. 

 256 ; 6 plates, 1 figure. No. 272. Part XII, North Pacific 

 Coast ; by J. C. Stevens, E. C. LaRue and F. F. Henshaw. 

 Pp. 521 ; 8 plates. No. 288. Part VIII, Western Gulf of 

 Mexico; by W. B. Freeman and J. G. Mathers. Pp. 149; 

 3 plates, 1 figure. 



No. 278. Water Resources of Antelope Valley, California ; by 

 Harry R. Johnson. Pp. 92 ; 7 plates, 11 figures. 



2. U. jS. Bureau of Mines, Joseph A. Holmes, Director. — 

 The work of the Bureau of Mines, established in 1910, has been 

 carried actively forward. The Bulletins recently issued include 

 the following : 



No. 7. Essential Factors in the Formation of Producer Gas ; 

 by J. K. Clement, L. H. Adams, and C. N. Haskins. Pp. 58 ; 

 16 figures. 



No. 8. The Flow of Heat through Furnace Walls ; by W. T. 

 Ray and Henry Kreisinger. Pp. 32, 19 figures. 



No. 12. Apparatus and Methods for the Sampling and Analy- 

 sis of Furnace Gases ; by J. C. W. Frazer and E. J. Hoffman. 

 Pp. 122; 6 figures. 



