EDITORIAL 727 



" Interglacial change of course, with gorge erosion, of the St. Croix River, 

 ill Minnesota and Wisconsin ; The Cuyahoga Preglacial Gorge in Cleveland, 

 Ohio." By Warren Upham. 



"A Revision of the Moraines of Minnesota." By J. E. Todd. 



"Origin of the High Terrace Deposits of the Monongahela River." By 

 I. C. White. 



"The Making of Mammoth Cave." By Horace C. Hovey. 



"The Colossal Cavern." By Horace C. Hovey. 



"James Hall, Founder of American Stratigraphic Geology." By W J. 

 McGee. 



" Professor Hall and the Survey of the Fourth District," By John M. 

 Clarke. 



" Sheetflood Erosion." By W J McGee. 



"Glacial Flood Deposits in the Chenango Valley." By Albert P. Brig- 

 ham. 



" Origin of Conglomerates." By T. C. Hopkins. 



" Origin of Topographic Features in North Carolina." By Collier Cobb. 



" The Cretaceous Clay Marl Exposure at Cliffwood, N. J." By Arthur 

 Hollick. 



"Post-Cretaceous Grade-Plains in Southern New England." By F. P. 

 Gulliver. 



"The Algonquin River." By G. K. Gilbert. 



"The Whirlpool-Saint David's Channel." By G. K. Gilbert. 



" Profile of the bed of the Niagara in its Gorge." By G. K. Gilbert. 



" The Niagara Falls Gorge." By George W. Holley. 



"Origin and Age of the Laurentian Lakes and of Niagara Falls." By 

 Warren Upham. 



"Correlation of Warren Beaches with Moraines and Outlets in South- 

 eastern Michigan." By F. B. Taylor. 



" Notes on the Glacial Succession in Eastern Michigan." By F. B. 

 Taylor. 



" The Operations of the Geological Survey of the State of New York." 

 By James Hall. 



"The Eocene Stages of Georgia." By Gilbert D. Harris. 



"The Origin and Age of the Gypsum Deposits of Kansas." By G. P. 

 Grimsley. 



"Geomorphic Notes on Norway." By J. W. Spencer. 



"The Slopes of the Drowned Antillean Valleys." By J. W. Spencer. 



"Notes on Kansan Drift in Pennsylvania." By E. H. Williams. 



" Preliminary Notes on the Columbian Deposits of the Susquehanna." By 

 H. B. Bashore. 



" Pre-Cambrian Base-leveling in the Northwestern States." By C. W. 

 Hall. 



