INDEX TO VOLUME XXIV 841 



PACE 



Phillip, Hans. Nochmals zur Frage der Glazialbildungen in der Rhon. 

 Erwiderung auf die Ausfiihrung von A. Penck und Ed Bruckner. 



Review by R. C. M I0 4 



. Untersuchung iiber Gletscherstruktur und Gletscherbewegung. 



Review by R, C. M 103 



Pirie, J. H. Harvey. Glaciology of the South Orkneys: Scottish 



National Antarctic Expedition. Review by T. T. Q. . . . 406 

 Pitchblende Ores of Colorado, Geology of the. By Edson S. Bastin. 



Review by V. 0. T. 307 



Ponca City Oil and Gas Field. By D. W. Ohern and R. E. Garrett. 



Review by W. B. W 827 



Powers, Sidney. The Acadian Triassic 1, 105, 254 



Pratt, Wallace E. An Unusual Form of Volcanic Ejecta . . . 450 

 Pre-Cambrian Algonkian Algal Flora. By Charles D. Walcott. Re- 

 view by T. T. Q 518 



Pre-Cambrian Geology of Southeastern Ontario, The. By Willet G. 



Miller and Cyril W. Knight. Review by T. T. Q 412 



Pre-Wisconsin Drift of North Dakota, The. By A. G. Leonard . 521 

 Prismatic Structure in Igneous Rocks, Types of. By Robert B . Sosman 215 

 Prosser, Charles S. Ripple-Marks in Ohio Limestones .... 456 



. The Classification of the Niagaran Formations of Western 



Ohio _ 334 



"Puff" Cones on Mount Usu. By Y. Oinouye 583 



Purdue, A. H. Geological Map of Tennessee. Compiled by Olaf P. 



Jenkins. Review by R. D. S 206 



Pyrite Ores of St. Lawrence County, Genesis of. By C. H. Smith, Jr. 



Review by W. B. W 821 



Pyrophyllitization, Pinitization, and Silicification of Rocks around Con- 

 ception Bay, Newfoundland. By A. F. Buddington ... 130 



Rabbit Ears Region, Routt, Grand and Jackson Counties, Colorado, 

 Reconnaissance of the Geology of the. By F. F. Grout, P. G. 

 Worcester, and Junius Henderson. Review by V. 0. T. . . 409 



Rainy Lake, The Archean Geology of, Re-studied. By Andrew C. 



Lawson. Review by T. T. Q 4" 



Rampart Quadrangle, Alaska, A Geologic Reconnaissance of a Part of 



the. By Henry M. Eakin. Review by V. O. T 102 



Recent Publications 3*°, 4*4, S^^i 



Recording Micrometer for Geometical Rock Analysis, A. By S. J. 



Shand 394 



Red Beds, The Origin of. A Study of the Conditions of Origin of the 

 Permocarboniferous and Triassic Red Beds of the Western United 

 States. By C. W. Tomlinson 1 S3. 238 



Reid, Harry Fielding. Variations of Glaciers. XX . . . . 5" 



Reinecke, Leopold. Average Regional Slope, A Criterion for the Sub- 

 division of Old Erosion Surfaces 



Reviews 95, 2o6 » 298,405. 5*5, 623, 720, S20 



Ripple Marks, Contributions to the Study of. By Douglas W. Johnson S09 



