VOLUME XXV 



THE 



NUMBER 5 



Journal of Geology 



A Semi-Quarterly 



Edited By 



THOMAS C. CHAMBERLIN AND ROLLIN D. SALISBURY 

 With the Active Collaboration of 



SAMUEL W. WfLLISTON, Vertebrate Paleontology ALBERT JOHANNSEN, Petrology 



STUART WELLER, Invertebrate Paleontology ROLLIN T. CHAMBERLIN, Dynamic Geology 



ALBERT D. BROKAW, Economic Geology 



ASSOCIATE EDITORS 



SIR ARCHIBALD GEIKlE, Great Britain 



CHARLES BARROIS, France 



ALBRECHT PENCK, Germany 



HANS REUSCH. Norway 



GERARD DeGEER, Sweden 



T. W. EDGEWORTH DAVID, Australia 



BAILEY WILLIS, Leland Stanford Junior University 



GROVE K. GILBERT, Washington, D.C. 



CHARLES D. WALCOTT, Smithsonian Institution 



HENRY S. WILLIAMS, Cornell University 



JOSEPH P. IDDINGS, Washington, D.C. 

 JOHN C. BRANNER, Leland Stanford Junior University 

 RICHARD A. F. PENROSE, Jr., Philadelphia, Pa. 

 *WILLIAM B. CLARK, Johns Hopkins University 

 WILLIAM H. HOBBS, University of Michigan 

 FRANK D. ADAMS, McGill University 

 CHARLES K. LEITH, University of Wisconsin 

 WALLACE W. ATWOOD, Harvard University 

 WILLIAM H. EMMONS, University of Minnesota 

 ARTHUR L. DAY, Carnegie Institution 

 *Deceased. 



JULY-AUGUST 1917 



THE LAWS OF ELASTICO-VISCOUS FLOW ----- A. A. Michelson 405 



THE PHILOGENY AND CLASSIFICATION OF REPTILES - - S. W. Williston 411 



OUR PRESENT KNOWLEDGE OF ISOSTASY FROM GEODETIC EVIDENCE 



William Bowie 422 



THE SATSOP FORMATION OF OREGON AND WASHINGTON - J Harlen Bretz 446 



THE CORROSIVE ACTION OF CERTAIN BRINES IN MANITOBA - R. C. Wallace 459 



NOTES ON THE 1916 ERUPTION OF MAUNA LOA - Harry O. Wood 467 



A PROPOSED DIP PROTRACTOR ----- Chester K. Wentworth 489 



PETROLOGICAL ABSTRACTS AND REVIEWS ----- Albert Johannsen 492 



RECENT PUBLICATIONS ----------'-.. 49 8 



THE 



UNIVERSITY OF CHICAGO 



CHICAGO, ILLINOIS, U.S.A. 



PRESS 



Agents : 



THE CAMBRIDGE UNIVERSITY PRESS, London and Edinburgh 



THE MARUZEN-KABUSHIKI-KAISHA, Tokyo, Osaka, Kyoto, Fukuoka, Sendai 



THE MISSION BOOK COMPANY, Shanghai 



