X BULLETIN OF THE GEOXOGICAL SOCIETY OF AMERICA 



Page 



Roots in the underclays of coal [abstract] ; by David White % 719 



Objects and methods of petrographic description [abstract]; by 



Charles P. Beekey , . 719 



Index 721 



ILLUSTRATIONS 



Plates 



Plate 1— Dilleb : Portrait of C. E. Dutton 10 



2— ^Kxowltox : Portrait of W J McGee 18 



3— Woodworth : Portrait of R. S. Tarr 29 



4— Buehleb : Portrait of E. R. Buckley 44 



" 5 — White : Concretions from Mexican oil fields 263 



" 6 " Cross-section of concretion from Mexican oil well 264 



" 7 — Watson and Clixe : Diabase dike exposed in railroad cut at 



Loch Laird, Rockbridge County, Virginia 307 

 "8 " " " Exposures of diabase dikes near Waynes- 

 boro, Augusta County, Virginia 308 



"9 u " " Exposures of nepheline syenite and camp- 



tonite dikes in northern Augusta County, 



Virginia 315 



" 10— Cushixg : Starks Knob, in August, 1910, from the southeast 339 



" 11 " Sheared and slickensided shales near base of Starks 



Knob 341 



" 12 — Gbabae: PJatystrophia ponderosa var. Stevensoni Grabau 453 



" 13 — Alden and Stebixgeb : Pre- Wisconsin glacial drift in the region 



of Glacier National Park, Montana. .. 529 

 " 14 " " " Glaciated pebbles from the pre- Wiscon- 



sin drift of Rocky Mountain glaciers 

 or remnants of the Blackfoot pene- 

 plain, and of the second (lower) plain 

 in southwestern Alberta and Black- 

 feet Indian Reservation, Montana .... 531 

 " 15 " " " Glaciated pebbles from the pre-Wiscon- 



sin drift of Rocky Mountain glaciers 

 or remnants of the Blackfoot pene- 

 plain, Blackfeet Indian Reservation, 



Montana 536 



16 " " " Deposits on Belly River twenty-seven 



miles south of Macleod, Alberta 559 



17 — Day and Shepherd : Panoramic view of Kilauea crater from 



Uwekahuna (July 7. 1912) 577 



18 " " " Panoramic view of Kilauea crater from 



the Volcano House (July 31, 1912) 578 



19 " " " Position of the dome (May 28, 1912) 580 



20 " " " View within the active pit, Halemaumau 



(May 28, 1912) 581 



