PRECAMBRIAN PRESIDENT 235 



Page 

 Pbecambrian rocks; Blackstone series of Dinuiond Hill-Cumberland dis- 

 trict 25, 440 



in the Medicine Bow Mountains of Wyoniins; ; E. Blackwelder and 



II. F. Crooks 29, 97 



of Ogdenburg-Canton quadrangle 26, 287 



, Origin of foliation in New York of 27, 57 



— sedimentary rocks in the highlands of eastern Pennsylvania; E. T. 



Wherry 28, IHC ; 29, 375 



of Alaska 25,187 



— structure of the Black Hills. South Dakota ; Sidney Paige 27, 106 



■ northern Black Hills as bearing on the Homestake ore body; 



Sidney Paige 24, 73, 293-300, 704 



— unconformity in Vermont ; A. Keith 25, 39 



Precipitation, Historic changes in 25, 542 



— ■ (level of maximum) as a factor in the glaciation of Mount Rainier; 



F. E. Matthes 24, 72, 701 



— , Relation of run-oft to 26, 223 



Precise leveling and the problem of coastal sul)sidence; D. \V. Johnson. 25,59 



Pre-Cketaceous Dinosaurs ; W. J. Holland 23, 85, 204 



Predentate dinosaurs, Species found of 26, 329 



Pre-Gi-acial course of the upper Hudson River: William J. Miller. ... 22,64, 



177-186 



— drainage of central western New York ; A. W. Grabau 21, 31 



— Erie outlet 24, 231 



— geology of the Puget Sound basin, Notes on the 23, 75 



— Miami and Kentucky rivers ; N. M. Fenneman 23, 51, 736 ; 25, 85 



Pre-Huronian land conditions 27, 188 



Preliminary geologic map of the Wayan quadrangle. Idaho-Wyoming; 



George R. Mansfield 27, 65 



— report of the conunittee on the nomenclature of the skull elements in 



the Tetrapoda ; W. K. Gregory 27, 152 



Pke-Onondaga jointing at Amherstburg, Ontario, Photograph of 27, 74 



Pke-Pleistocene geology in the vicinity of Seattle; C. E. ^Veaver. ... 26,130 



Presence of a median eye in trilobites ; Rudolph Ruedemanu 27, 146 



Present status of areal mapping in the Coastal I'lain and of the paleon- 



tologic investigations in the Coast Plain, Panama, and Windward 



Islands ; T. W. Yaughan 28, 205 



the problem of the origin of loess ; C. W. Tomlinson 29, 73 



Presentation of geologic information for engineering purposes; T. W. 



Yaughan 30, 79 



President, Annual address of 22, 55 ; 23, 49 ; 24, 54 ; 



25, 48 ; 26, 86, 171 : 27. 175 ; 28. 159 ; 29, 167 ; 30, 117 



— , Election of F. D. Adams as 28, 12 



G. F. Becker as 25, 5 



J. M. Clarke as 27, 11 



A. P. Coleman as 26, 11 



Whitman Cross as 29. 11 



— W. M. Davis as 22, 2 



