Recent Publications 



— ScHALLER, W. T. Gems and Precious Stones in 1918. [U.S. Geological 



Survey, Mineral Resources of the United States, 1918. Part 11:3. 



Washington, 1919.] 

 — ScHiNDLER, Robert. Zur Frage der fossilen Brennstoffe und der diesbe- 



zughchten Dogmen der Geologie. (Im Selbstverlag des Verfassers.) 



[Luzern, 1918.] 



— ScHWENNESEN, A. T. Ground Water in the Animas, Playas, Hachita, and 



San Luis Basins, New Mexico. With Analyses of Water and SoU, by 

 R. F. Hare. [U.S. Geological Survey, Water-Supply Paper 422. Wash- 

 ington, 1918.] 



— Shaw, E. W., and Mather, K. F. The .Oil Fields of Allen County, Ken- 



tucky. With Notes on the Oil Geology of Adjoining Counties. [U.S. 



Geological Survey, Bulletin 688. Washington, 1919.] 

 — SiEBENTHAL, C. E. Lead in 1916. General Report. [U.S. Geological 



Survey, Mineral Resources of the United States, 1916. Part 1:27. 



Washington, 1919.] 

 . Zinc and Cadmium in 1916. [U.S. Geological Survey, Mineral 



Resources of the United States, 1916. Part 1:26. Washington, 1919.] 

 — Sjogren, Hj. (Editor). Bulletin of the Geological Institution of the 



University of Upsala, Vols. XIII, 2; XIV, XV. [Upsala, 1917.] 

 — Smith, E. A. Statistics of the Mineral Production of Alabama for 1916. 



Compiled from the Mineral Resources of the United States. [Geological 



Survey of Alabama, Bulletin No. 20. University, Alabama, 1918.] 

 — South Dakota State School of Mines, Annual Catalog, 1917-1918. With 



Announcements for 1918-1919. [Rapid City, April, 1918.] 

 — Stewart, J. S. Geology of the Disturbed Belt of Southwestern Alberta. 



[Canada Department of Mines, Geological Survey, Memoir 112; No. 93, 



Geological Series; No. 1740. Ottawa, 1919.] 

 — Stone, R. W. Phosphate Rock in 1918. [U.S. Geological Survey, Mineral 



Resources of the United States, 1918. Part II 19. Washington, 1919.] 

 . Salt, Bromine, and Calcium Chloride in 1918. [U.S. Geological 



Survey, Mineral Resources of the United States, 1918. Part II : 5. Wash- 

 ington, 1919.] 



Sand and Gravel in 191 7. [U.S. Geological Survey, Mineral 



Resources of the United States ,1917. Part 11:25. Washington ,1919. 

 -Sutton, C. W., and Portocarrero, J. N. Informe Preliminar de Irri- 

 gacion de las Pampas de Chancay. Boletin de Cuerpo del Ingenieros 

 de Minas del Peru, No. 94. [Lima: Imp. Torres Aguirre-Lartiga, 425, 

 1918.] 



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