Vlll 



INDEX TO VOLUME I. 



Eruptive Rocks of Montana, Waldemar Lindgren. A Sodalite-Syenite 

 and other Rocks from Montana, W. Lindgren. Acmite-Trachyte from 

 the Crazy Mountains, Montana, J. E. Wolff ; by Joseph P. Iddings. - 634 

 The Mineral Industry, its Statistics, Technology and Trade in the United 



State sand other Countries, Richard P. Rothwell ; by R. A. F. Penrose, Jr. 414 

 Monographs of the United States Geological Survey. Vol. XVII. The 



Flora of the Dakota Group, Leo Lesquereux ; by David White. - 300 



On the Organization of the Fossil Plants of the Coal-Measures, W. C. 



Williamson ; by F. H. Knowlton. ----- 303 



Recent Contributions to the Subject of Dynamometamorphism from the 

 Alps. A. Heim, C. Schmidt, L. Milch, M. P. Termier; by Geo." H. 

 Williams. -------- 850 



Text-book of Comparative Geology, E. Kayser ; by R. D. Salisbury. - 745 

 Text-Book of Geology. Sir Archibald Geikie ; by R. D. Salisbury, - 856 

 Rivers. Some Rivers of Connecticut. Henry B. Kummel. - - 371 



Russell, Israel C. Geological History of the Laurentian Basin. Studies for 



Students. -------- 394 



Malaspina Glacier. - - - - - -219 



Salisbury, Rollin D. Distinct Glacial Epochs and the Criteria for their Recog- 

 nition. Studies for Students. - - - - - 61 



Reviews : — On the Glacial Succession in Europe. James Geikie. - 90 



Correlation Essays, Archean and Algonkian. C. R. Van Hise. - 5 2 5 



Text-book of Comparative Geology. E. Kayser. - - - 745 



Text-Book of Geology. Sir Archibald Geikie. - 856 



Sand-Plain of Newtonville. F. P. Gulliver. - - - 803 



Sedimentary Rocks. Geologic Time as Indicated by the Sedimentary Rocks of 



North America. Chas. D. Walcott. - - - - 639 



Sketch of the Present State of Knowledge concerning the Basic Massive Rocks 



of the Lake Superior Region. W. S. Bayley. - - - 587 



Smyth, H. L. A Contact between the Lower Huronian and the Underlying 



Granite in the Republic Trough, near Republic, Michigan. - - 268 



South Mountain. The Structures, Origin, and Nomenclature of the Acid Vol- 

 canic Rocks of South Mountain. F. Bascom. - - - - 813 



Stevenson, John J. On the Origin of the Pennsylvania Anthracite. 677 



Stone, Geo. H. The Las Animas Glacier. - - - - - 471 



The Osar Gravels of the Coast of Maine. - - 246 



Studies for Students : 



Conditions of Sedimentary Deposition. Bailey Willis. - - 476 



Distinct Glacial Epochs and the Criteria for their Recognition. Rollin 



D. Salisbury. ----- - 61 



The Elements of the Geological Time-Scale. H. S. Williams. - - 283 



Genetic Relationships among Igneous Rocks. J. P. Iddings. - 833 



Geological History of the Laurentian Basin. Israel C. Russell. - 394 



The Making of the Geological Time-Scale. H. S. Williams. 180 



Time-Scale. The Elements of the Geological Time-Scale. Studies for Stu- 

 dents. II. S. Williams. ....-- 283 



