49 



Thielson Mountain, basalt analysis — Clarke and Chatard, 2f^. 



Thielson Mountain— Dillor. <)(). 



Three Sisters — Fairbanks, 139. 



Three-toed horse from upper miocene — -Cope, 64. 



Tillamook County— Parks, 245a; Diller, 98; Stafford. 289. 



Topography of Klamath Mountains — Diller, 106. 



Topography — Topography work in Oregon, 295. 



Topography of Oregon and Washington compared to California — Becker, 7. 



Touring in Oregon and Washington — Victor, Mrs., 300, 301. 



Tourists guide — Winser, 327. 



Trail making — Victor, Mrs., 302. 



Triangulation in Oregon and California — U. S. 0. S. Bull. 440, 297c. 



Trias in Northeastern Oregon — Lindgren, 193. 



Turtles fossil — Hay, 155. 



Two islands and what became of them — Condon, 34. 



Two new species (family oreodentidae) — Bettany. 11. 



U 



Union C(nmt\ — Rickard, 256; Hill, l.")5a; Stafford, 279. 



V 



Vein walls — Rickard, 256. 



Vertebrate fossils — Marsh, 208. 



Vertebrate fossils — Leidy. 185. 



Vertebrate fauna — Leidy, 185. 



Vertebrate fossils of Silver Lake — Cope, 74. 



Vertebrate fauna of the tycholeptus — Cope, 66. 



Vertebrate of the West — Cope, 63. 



Vertebrate, list of species — Cope, 45. 



Volcanic activity and glaciers of Mt. Hood — Sylvester, 290, 291. 



Volcanoes — Hague and Iddings, 152. 



Volcanoes — Emmons, 132. 



W 



Wallowa County— Reid, 252; Condon, 34, 35a; Stafford, 279. 



Wasco County— Leidy, 183; Condon, 34, 35a; Stafford, 279. 



Washington County — Parks, 245a; Diller, 98; Condon, 34, 35a. 



Water resources of the Northwest^U. S. G. S. Press Bull. No. 45, March, 1912, 



297a. 

 Water supply— Newell, 237; U. S. G. S., 297. 

 Water resources — Water Resources, 315. 

 Wheeler County— Hill, 155 A; Stafford, 279. 

 Willamette meteorite — W'ard, 304. 

 Willamette meteorite — Hovey, 158. 



Willamette meteorite — Eberle, 129; Winchell, 326a, 326b. 

 Willamette Sound — Condon, 30. , 



Y 



Yamhill County— Parks, 245a; Diller, 98; Condon, 34, 35a; Stafford, 289. 



