viii CONTENTS OF VOLUME XII 



NUMBER VIII 



PAGE 



The Relations of the Earth Sciences in View of their Progress 



IN THE Nineteenth Century. W. M. Davis - - - - 669 



Notice of Some New Reptiles from the Upper Trias of Wyoming. 



S. W. Williston ---------- 688 



Pleistocene Geology of the Sawatch Range, near Leadville, Colo. 



S. R. Capps and E. D. K. Leffingwell - - - - - - 698 



Three New Physiographic Terms. RoUin D. Salisbury - - 707 



On Certain Aspects of the Loess of Southwestern Iowa. O. W. 



Willcox - - - - - ^16 



The Effect of Superglacial D£bris on the Advance and Retreat 



OF Some Canadian Glaciers. I. H. Ogilvie - - - . 722 



Reviews: A Treatise on Metamorphism, Charles Richard Van Hise (K.), 

 744; The Stone Reefs of Brazil, Their Geological and Geographical 

 Relations, with a Chapter on the Coral Reefs, John Caspar Branner 

 (T. C. C), 748; The Copper Deposits of the Encampment District 

 of Wyoming, Arthur C. Spencer (W. D. S.), 752; Recent Seismological 

 Investigations in Japan, Dairoku Kikuchi (T. C. C), 754; Earth- 

 quakes in the Eight of the New Seismology, Clarence Edward Dutton 

 (T. C. C), 756. 



