Contents of Volume 7. 



NUMBER I. 



On the Pre-Cambrian Rocks of the British Isles. Sir Archibald 



Geikie. ............ i 



Are there Traces of Glacial Man in the Trenton Gravels ? 



W. H. Holmes 15 



Geology as a Part of a College Curriculum. H. S. Williams. . 38 



The Nature of the Englacial Drift of the Mississippi Basin. 



T. C. Chamberlin. .......... 47 



Studies for Students : Distinct Glacial Epochs and the Criteria for their 



Recognition. Rollin D. Salisbury. ....... 61 



Editorials . . . 85 



Reviews : On the Glacial Succession in Europe, James Geikie ; by Rollin D. 



Salisbury. ............ go 



Analytical Abstracts of Current Literature : The Sub-Glacial Ori- 

 gin of Certain Eskers ; William Morris Davis. Studies in Structural 

 Geology ; Bailey Willis. The Catskill Delta in the Post-Glacial 

 Hudson Estuary; William Morris Davis. Geological Survey of Ala- 

 bama—Bulletin 4; C. Willard Hayes. The Correlation of Moraines 

 with Raised Beaches of Lake Erie ; Frank Leverett. The Climate of 

 Europe during the Glacial Epoch ; Clement Reid. On the Glacial 

 Period and the Earth Movement Hypothesis; James Geikie. . . 95-100 



Acknowledgments. 101 



NUMBER II. 



An Historical Sketch of the Lake Superior Region to Cambrian 



Time. C. R. Van Hise 113 



The Glacial Succession in Ohio. F"rank Leverett 129 



Traces of Glacial Man in Ohio. W. H. Holmes 147 



The Volcanic Rocks of the Andes. Joseph P. Iddings. . . 164 



On the Use of the Terms Poikilitic and Micropoikilitic in Petrog- 

 raphy. George H. Williams. ........ 176 



Studies for Students. The Making of the Geological Time-Scale. H. 



S. Williams. .......... 180 



Editorials loS 



