EDITORIAL 537 



of lights and shadows as wholesome as it was skilful ; that of 

 Vice-President Van Hise on the philosophy of ore deposition 

 was clear, strong and effective, and especially laudable, as a 

 popular address in a mining region, for its unhesitating advocacy 

 of the unpalatable as well as the acceptable phases of his 

 doctrine. 



Previous to the meeting a ten-day excursion of geologists 

 was planned by Professors Van Hise and Emmons and carried 

 out in a most admirable manner. The selection of routes and 

 places from among the phenomenal possibilities of Colorado 

 certainly made no small demands upon the knowledge and dis- 

 cretion of those in charge, but no whisper of a possible improve- 

 ment was heard. The climax of interest was reached in the 

 San Juan Mountains, where the exemplification of many and 

 varied phases of geological phenomena from the Archean to the 

 Pleistocene is marvelously impressive. The aid rendered by 

 prominent citizens at various points visited and the generous 

 hospitality extended to the party were beyond all praise. It 

 would be a delight to acknowledge our obligations in special and 

 individual terms, if, beginning with the exceptional courtesies of 

 Walsh, Lay, and Freeland, it were possible to find an end of the 

 list. About two dozen geologists participated. 



The four geological sessions were crowded with papers well 

 distributed over the various departments of geology and 

 embodying much of exceptional interest and value. The papers 

 read before the Geological Society of America, presented on 

 the first morning, were as follows : "Account of the Geological 

 Excursion," C. R. Van Hise; "Junction of the Lake Superior 

 Sandstone and the Keweenawan Traps in Wisconsin," U. S. 

 Grant ; " Hydrographic History in South Dakota," J. E. Todd 

 "The Still Rivers of Western Connecticut," W. H. Hobbs 

 " Geology of the Northeast Coast of Brazil," John C. Branner 

 "Classification of the Geological Formations of Tennessee,' 

 James M. Safford ; " Horizons of Phosphate Rock in Ten- 

 nessee," James M. Safford. 



The following papers were presented before Section E : 



