RECENT PUBLIC A TIONS 361 



-Perkins, G. H. Tertiary Lignite of Brandon, Vermont, and its Fossils. 



[Bulletin of the Geological Society of America, Vol. XVI; Dec, 1905; 



18 pp., 2 pis.] 

 -Philips, William Battle. The Quicksilver Deposits of Brewster County, 



Texas. [Economic Geology, Vol. I, pp. 155-63; Nov. -Dec, 1905.] 

 -PjETURSSON, Helgi. Om Islands Geologi. [Kobenhavn, 1905; 104 pp., 



18 figs.] 

 Das Pleistocan Islands. Einige Bemerkungen zu den vorlaufigen Mit- 



teilungen Dr. W. v. Kuebel's. [Separat-Abdruck aus dem Centralblatt 



fur Mineralogie, Geologic und Palaontologie, Jahrg. 1905; 6 pp.] 

 -PuRiNGTON, Chester Wells. Ore Horizons in the Veins of the San Juan 



Mountains, Colorado. [Economic Geology, Vol. I, pp. 129-34; Nov.- 



Dec, 1905.] 

 -Ransome, Frederick Leslie. The Present Standing of Applied Geology 



[Ibid., pp. i-ii; Oct. -Nov., 1905.] 

 -Read, Thomas Thornton. The Phase-Rule and Conceptions of Igneous 



Magmas, with Their Bearing on Ore-Deposition. [Ibid., pp. 101-19; 



Nov. -Dec, 1905.] 

 rRiCKARD, T. A. The Economics of Mining. [Engineering and Mining 



Journal, 1905; 421 pp.] 

 -Sanin, Eugenio. The Present Condition of the Gold Mining Industry in 



Columbia. [Mining Magazine, Feb., 1906; 6 pp.) 

 -Sarle, C. J. Arthropycus and Daedalus of Burrow Origin. [Proceedings 

 of the Rochester Academy of Science, Vol. IV, Feb., 1906; 8 pp., 4 figs.] 

 Preliminary Note on the Nature of Taonaurus. [Ibid., 4 pp., 2 figs.] 



-Schreiner, Oswald, and Failyer, George H. Calorimetric, Turbidity, 

 and Tritration Methods Used in Soil Investigations. [U. S. Department 

 of Agriculture, Bureau of Soils, Bulletin No. 31, 1906; 60 pp., i pi., 5 figs.] 



-ScHWARZ, E. H. L. The Coast Ledges in the South-West of the Cape Colony. 

 [Quarterly Journal of the Geological Society, Vol. LXII, Part I; Feb. 16, 

 1906; 18 pp.] 



-Siebenthal, C. E. Structural Features of the Joplin District. [Economic 

 Geology, Vol. I, pp. 119-29; Nov.-Dec, 1905.] 



-Smith, Eugene Allen. Revised Map of the Southeastern Part of the Cahaba 

 Coal Field with Cohmnar Section. [Geological Survey of Alabama, 1905.] 



-Stanton, T. W. Morrison Formation and its Relations with the Comanche 

 Series and the Dakota Formation. [Journal of Geology, Vol. XIII, Nov.- 

 Dec, 1905; 13 pp.] 



-Stanton, T. W., and Martin, G. C. Mesozoic Section on Cook Inlet and 

 Alaska Peninsula. [Bulletin of the Geological Society of America, Vol. XVI, 

 June, 1905; 20 pp., 4 pis.] 



