Recent P ublications 



— Seibert, F, M., and Harpster, W. C. Use of the Interferometer in Gas 

 Analysis. [U.S. Bureau of Mines, Technical Paper 185. Washington, 

 1918.] 



—Seward, A. C. Fossil Plants. Vol. III. Pteridspermeae, Cycadofilices, 

 Cordaitales, Cycadophyta. Cambridge University Press. [London: 

 Fetter Lane, E. C. New York: G. P. Putnam's Sons. 1917. Price i8.y. 

 net.] 



— Smellie, W. R. The Igneous Rocks of Bute. Transactions of the Geo- 

 logical Society of Glasgow, Vol. XV, Part III, pp. 334-73. Plates 

 XXXVI-XXXIX. [Glasgow, 1916.] 



— Smith, C. G. Cost Accounting for Oil Producers. [U.S. Bureau of Mines, 

 Bulletin 158. Washington, 1917.] 



— Smith, P. S. The Lake Clark-Central Kuskokwim Region, Alaska. [U.S. 



Geological Survey, Bulletin 655. Washington, 191 7.] 

 . The Mining Industry in Alaska in the Calendar Year 1916. 



[U.S. Bureau of Mines, Bulletin 153. Washington, 191 7.] 

 — Stone, R. W. Gypsum Products, Their Manufacture and Uses. [U.S. 



Bureau of Mines, Technical Paper 155. Washington, 191 7.] 

 — ^Taylor, C. H., Editor. Bulletin of the American Association of Petroleum 



Geologists. Vol. II. 1918. 

 , Bulletin of the Southwestern Association of Petroleum Geologists. 



Vol. I. 191 7. 

 — ^Taylor, G. B., and Cope, W. C. Initial Priming Substances for High 



Explosives. [U.S. Bureau of Mines, Technical Paper 162. Washing- 

 ton, 1917.] 

 — Tennessee, The Resources of. Vol. VIII. 1918. [Tennessee Geological 



Survey, NashvUle.] 



— Thompson, J. W. Abstracts of Current Decisions on Mines and Mining, 

 January to April, 1917. [U.S. Bureau of Mines, Bulletin 152. Wash- 

 ington, 191 7.] 



Abstracts of Current Decisions on Mines and Mining. [U.S. Bureau 



of Mines, Bulletin 159. Washington, 1917.] 

 -Thornberry, M. H., and Mann, H. T. The Effect of Addition Agents 

 in Flotation. Part I : Sulphates, Hydroxides and Nitrates. University of 

 Missouri School of Mines and Metallurgy, Bulletin, Vol. IV, No. 2. 

 [Rolla, 191 7.] 



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