iv CONTENTS OF VOLUME VI 



PAGE 



scope, by Alfred Harker (review by J. P. I.), 207 ; Rocks, Rock Weath- 

 ering and Soils, by J. P. Merrill (review by C), 208 - 205-210 



Abstracts : Papers read at the Montreal Meeting of the Geological Society 

 of America : Topography and Glacial Deposits of the Mohawk Val- 

 ley, by Albert Perry Brigham, 211 ; Clastic Huronian Rocks of West- 

 ern Ontario and the Relations between Laurentian and Huronian, by 

 A. P. Coleman, 212 211-214 



Recent Publications - - 214 



NUMBER III. 



Chemical and Mineral Relationships in Igneous Rocks. Joseph P. 



Iddings ------------ 219 



The Weathered Zone (Yarmouth) Between the Illinoian and Kan- 



san Till Sheets. Frank Leverett ------- 238 



The Peorian Soil and Weathered Zone (Toronto Formation?). 



Frank Leverett ----------- 244 



A Geological Section Across Southern Indiana, from Hanover to 



Vincennes. John F. Newsom -------- 250 



Notes on the Ohio Valley in Southern Indiana. Arthur C. Veatch - 257 



The Brown or Yellow Loam of North Mississippi, and Its Relations 



to the Northern Drift. T. O. Mabry ----- 273 



Classification of the Mississippian Series. Stuart Weller - - - 303 



Editorial- - - 315 



Reviews: Professor Spring on the Physics and Chemistry of Solids (review 

 by C. F. Tolman, Jr.), 318 ; United States Geologic Atlas, Folio 37, 

 Downieville, Cal., 1897, 324; Bulletin of the American Museum of 

 Natural History, Vol. IX (review by Stuart Weller), 326 - - -318-330 



Abstracts : Paper read at the Montreal Meeting of the Geological Society 

 of America: Weathering of Alnoite in Manheim, N. Y., by C. H. 

 Smyth, Jr.- - 331 



NUMBER IV. 



A Symposium on the Classification and Nomenclature of Geologic 

 Time-Divisions. Joseph Le Conte, 327 ; G. K. Gilbert, 338 ; Wm. 

 Bullock Clark, 340 ; S. W. Williston, 342 ; Bailey Willis, 345 ; C. R. 

 Keyes, 347 ; Samuel Calvin, 352 - 333 



