8CHMECKEBIER.] POWELL, AND WHEELEK 8FBVEY8. 189 



Trachyte, analysis of, from Idaho, Shoshone Falls K, i, p 604 



analysis of, from Idaho, Snake River, vicinity of K, i, p 604 



from Nevada, Euclid Peak _ K, ii, p 522 



Pine Nut Canyon K, ii, p 701 



Truckee Ferry K, ii, p 833 



Truckee Ferry, Truckee Canyon, Washoe, Virginia Mountains, 



Peoquop range K, i, p 604 



from Oregon, Mount Hood K, i, p 605 



from Utah, Midway, vicinity of K, ii, p 320 



Wasatch Mountains K, i, p 604 



from Washington, Mount Rainier K, i, p 604 



from Wyoming, Leucite Hills K, i, p 604 



characteristics of HP, pp 104-108 



of Basin Ranges W, iii, pp 255-256 



of Black Hills, petrography of '. BH, pp 488-492 



of Colorado, El Late Mountains H, Ann 9, pp 272-273 



Gunnison region H, Ann 8, pp 163-168 



occurrence and character of H, Ann 10, pp 214-229, 232-245 



Rio Grande H, Ann 9, pp 156-157 



White River district H, Ann 10, p 112 



of Fortieth Parallel region K, i, pp 578-605 



microscopic petrography of K, vi, pp 143-162 



of Nevada, Washoe district K, iii, pp 33-36 



of New Mexico, north central W, iii, Supp, pp 164-167 



of Utah, Grand River district H, Ann 9, pp 94-98 



White River district H, Ann 10, p 112 



Traverse, logarithm, and altitude tables W, Unci 11 



Tree growth on the plains H, Ann 4, pp 456-457 



Trees, fruit and forest, in Nebraska, cultivation of LOR, 1867, 



pp 131-133, 135-136; H, Ann 1, pp 10-12, 14-16 



Trenton group, invertebrate fossils of, from Nevada and New Mexico W, iv, 



pp 62-78; W, Unci 6, pp 15-23 



invertebrates of, of southwest W, iv, pp 62-78 



Trephining, on cranial amulets and prehistoric Eth v 



(See, also, Ethnology and archseology.) 

 Triangulation in Colorado.. H, Ann 10, pp 275-310; H, Bull, vol m, No 3, pp 706-728 



in Fortieth Parallel region K, i, pp 764-768 



in Wyoming H, Ann 11, pp 651-672 



Triassic fossils, invertebrates of Fortieth Parallel region K, iv, pp 99-129, 280-283 



of southeastern Idaho H, Ann 12, i, pp 105-118 



(See, also. Vertebrates, fossil; Invertebrates, fossil; Plants, fossil.) 



Triassic rocks of Basin Ranges W, in, pp 175-176 



of Black Hills 1 BH, pp 131-151 



of Colorado, central W, iii, pp 378-381 



Eagle, Grand and Gunnison rivers H, Ann 8, pp 121-124 



Front Range H, Ann 8, pp 42-44; K, ii, pp 33-37 



east of H, Ann 7, pp 95-98 



Grand River district H, Ann 9, pp 80-86; H, Ann, 10 pp 178-180 



northwestern .H, Ann 10, pp 26-28 



of Colorado Plateau W, iii, pp 282-285 



of Fortieth Parallel area 1 K, i, pp 249-284 



of Idaho, eastern H, Ann 11 , pp 492-494, 622-623 



of Utah, Grand River district H, Ann 9, pp 80-86; H, Ann 10, pp 178-180 



high plateaus HP, pp 148-150 



of Wyoming, Colorado Range K, ii, pp 33-37 



