2 PROCEEDINGS OF THE BALTIMORE MEETING 



Page 



Engineering geology iu and after the war [abstract and discus- 

 sion] ; by Charles P. Berkey 81 



Geology in the students' army training corps [abstract] ; by Her- 

 bert E. Gregory 81 



War work by the department of geology at the University of Ore- 

 gon [abstract] ; by Warren D. Smith 83 



Titles and abstracts of papers presented before the afternoon session 

 and discussions thereon 83 



Recent earthquakes of Porto Rico [abstract] : by Harry Fielding 

 Reid and Stephen Taber 83 



Structure of the Pacific ranges, California [abstract and discus- 

 sion] ; by Bailey Willis 84 



Migration of geosynclines [abstract] : by Amadeus W. Grabau. . . 87 



Geotectonic adaptation through retardation of the earth's rota- 

 tion [abstract] ; by Charles R. Keyes 87 



Late Mississippian orogenic movements in North America [ab- 

 stract] ; by Francis M. Van Tuyl and Raymond C. Moore 88 



Post-Glacial uplift of the New England coastal region [abstract] ; 

 by Herman L. Fairchild 89 



Topographic features of the Hudson Valley and the question of 

 post-Glacial marine waters in the Hudson-Champlain Valley 

 [abstract and discussion] ; by James H. Stoller 90 



Subterranean "chalk-streams" of northern France [abstract] ; by 

 Edward Moore Burwash 91 



Relative efficiency of normative and modal classifications of igne- 

 ous rocks [abstract] ; by Edward B. Mathews 91 



Pegmatite, silexite, and aplite dikes of northern New York [ab- 

 stract] ; by William J. Miller 93 



Magnetic iron-ore deposits of Clinton County, New York [ab- 

 stract] ; by William J. Miller 93 



Session of Friday evening, December 27 94 



Cooperation in geological instruction [abstract] ; by Herbert E. 



Gregory 94 



Session of Saturday morning, December 28 95 



Report of the Auditing Committee 95 



Titles and abstracts of papers presented at the morning session and 

 discussions thereon 95 



High-grade clays of the United States [abstract] ; by H. Ries 95 



Occurrence and origin of white claj'S at Saylorsburg, Monroe 

 Countj', Pennsylvania [abstract] ; by Frederick B. Peck 96 



Oil geology in relation to valuation [abstract] ; by Ralph Arnold. 96 



Rock products and the war [abstract] ; bj' G. F. Loughlin 97 



Manganese ore as a war mineral [abstract] ; by D. F. Hewett. ... 97 



Economic limits to domestic independence in minerals [abstract 

 and discussion] ; by George O. Smith 98 



Imperial Mineral Resources Bureau, London ; by Willet G. Miller. 100 



Some problems of international readjustment of mineral supplies 

 as indicated in recent foreign literature [abstract and discus- 

 sion] ; by Eleanora F. Bliss 101 



