486 RECENT PUBLICATIONS 



— Catalano, M. H. Evaluacion del Anhidrido Carbonico en las Aguas. 

 Boletin No. 7 Serie D (Quimica Mineral y Aguas Minerales). Direc- 

 cion General de Minas, Geologia e Hidrologia. TaUeres Graficos del 

 Ministerio de Agricultura de la Nacion. [Buenos-Aires, 1918.] 



— Clement, J. K., and Lawrence, C. N. Laboratory Determination of 

 the Inflammability of Coal Dust and Air Mixtures. [U.S. Bureau of 

 Mines, Technical Paper 144. Washington, 1917.I 



— Collins, W. H. Onaping Map-Area. [Canada Department of Mines, No. 



1655. Geological Survey, Memoir 95; Geological Series, No. 77. 



Ottawa, 1917.] 

 — COMISSAO do Servifo Geologico de Portugal, Comunicoes da. Tom. XII, 



1917. [Servifo Geologico, Lisboa.] 



— CoRTi, H. Contribution al Estudio del Agua del Rio Mina Clavero (Pro- 

 vincia de Cordoba). Con un Informe Preliminar Sob re la Region de 

 Mina Clavero, por el Ingeniero Gregorio Prilutzky. Boletin No. 6, 

 Serie D (Quimica Mineral y Aguas Minerales). Direccion General de 

 Minas, Geologia e Hidrologia. TaUeres Graficos del Ministerio de 

 Agricultura de la Nacion. [Buenos Aires, 1918.] 



— CoRTi, H., Sagastume, C. a., y Giovanetti, M. La Portabilidad de las 

 Aguas Argentinas en sus Relaciones con la Salinidad. Contribucion a su 

 Estudio. Boletin No. 8, Serie D (Quimica Mineral y Aguas Minerales) . 

 Direccion General de Minas, Geologia e Hidrologia. TaUeres Graficos 

 del Ministerio de Agricultura de la Nacion. [Buenos Aires, 1918.] 



— CuSHMAN, J. A. Some Pliocene and Miocene Foraminifera of the Coastal 

 Plain of the United States. [U.S. Geological Survey, Bulletin 676. 

 Washington, 1918.] 



— Darton, N. H. The Structure of Parts of the Central Great Plains. [U.S. 

 Geological Survey, Bulletin 691-A, Contributions to Economic Geology, 



1918, Part IIj pp. 1-26. Washington, 1918.I 



— Dean, E. W., and Hill, H. H. Determination of Unsaturated Hydro- 

 carbons in Gasoline. [U.S. Bureau of Mines, Technical Paper 181. 

 Washington, 1917.] 



— DouTHiTT, Herman. The Structure and Relationships of Diplocaulus. 

 Contributions from Walker Museum, Vol. II, No. i. [Chicago: Univer- 

 sity of Chicago Press, 1917. Price, 28 cents.] 



— DuNLor, J. P., and Butler, B. S. Silver, Copper, Lead, and Zinc in the 

 Central States in 1917. [U.S. Geological Survey, Mineral Resources 

 of the United States, 1917, Part I, pp. 73-130. Washington, 1918.] 



— Dykema, W. p. Recovery of GasoUne from Natural Gas by Compression 

 and Refrigeration. [U.S. Bureau of Mines, Bulletin 151. Washing- 

 ton, 1918.] 



