IV CONTENTS OF VOLUME /. 



Analytical Abstracts of Current Literature. The Age of the 

 Earth; Charles King. The Age of the Earth; Warren Upham. 

 Continental Problems ; G. K. Gilbert. Measurement of Geological 

 Time ; T. Mellard Reade. Recent Archseological Explorations in the 

 Valley of the Delaware ; Chas. C. Abbott. The Drainage of the Jura ; 

 August F. Foerste. Deep-Sea Sounding ; Capt. A. S. Barker. Obser- 

 vations and Experiments on the Fluctuations of the Level and Rate of 

 Movement of Ground-Water ; Franklin H. King. .... 202-208 



Acknowledgments 209 



NUMBER III. 



Malaspina Glacier. Israel C. Russell 219 



The Osar Gravels of the Coast of Maine. George H. Stone. . 246 



The Horizon of Drumlin, Osar and Kame Formation. T. C. 



Chamberlin. ........... 255- 



A Contact between the Lower Huronian and the Underlying 

 Granite in the Republic trough, near Republic, Michigan. 

 Henry Lloyd Smyth. .......... 268 



A Pleistocene Manganese Deposit, Near Golconda, Nevada. R. A. 



F. Penrose, Jr 275 



Studies for Students : The Elements of the Geological Time-Scale. 



H. S. Williams 283 



Editorials 296 



Reviews : Monographs of the U. S. Geological Survey, vol. XVII. The 

 Flora of the Dakota Group ; Leo Lesquereux, by David White. 

 Cretaceous Fossil-Plants from Minnesota ; Leo Lesquereux, by F. 

 H. Knowlton. On the Organization of the Fossil-Plants of the Coal- 

 Measures ; W. C. Williamson, by F. H. Knowlton. .... 300-303 



Analytical Abstracts of Current Literature ; Summary of Current 



Pre-Cambrian North American Literature ; C. R. Van Hise. . . 304 



Acknowledgments. 315 



NUMBER IV 



On the Typical Laurentian Area of Canada. Frank B. Adams. . 325 



Melilite-Nepheline-Basalt and Nepheline-Basanite from Southern 



Texas. A. Osann 341 



Some Dynamic Phenomena Shown by the Barabcio Quartzite 



Ranges of Central Wisconsin. C. R. Van Hise. . . . 347 



The Chemical Relation of Iron and Manganese in Sedimentary 



Rocks. R. A. F. Penrose, Jr 356 



Some Rivers of Connecticut. Henry B. Kiimmel 371 



Studies for Students : Geological History of the Laurentian Basin. 



Israel C. Russell. 394 



Editorials 409 



