102 
INDEX. 
Page. 
Stropheodonta, occurrence of 22 
Summit Road House, rainfall at 58-59 
Syringopora, occurrence of 21 
T. 
Tanana River, rainfall on 59 
tributaries of 11 
Tenderfoot Creek, gold on 29,60 
Tertiary rocks, character and distribution 
of . . . 16,24 
Thanksgiving Creek, gold on 83,92-93 
Thawing, methods of 49-50 
Timber, distribution of 14-15,31 
map showing 14 
Tolovana Flats, location of 12 
Tolovana River, timber on 14 
Tom Creek, gold on 40 
Topography, description of 11-13 
Trail Creek, flow of - 55 
Transportation, methods and routes of 30 
Travel, cost of 30 
Treasure Creek, gold on 29, 43 
Troublesome country, character of 64 
Troublesome Creek group, creeks of 95-96 
description of 95 
Troublesome Valley, rocks in 20-21,27 
Twin Creek, rocks on 26 
V. Page. 
Vault Creek, gold on 29, 43-44 
Vegetation, characterand distribution of. 14-15, 61 
W. 
Wages, rate of 51, 66 
Water, underground, circulation of 35 
Water supply, plans for 48, 51, 93-94 
What Cheer Bar, gold of 86 
White Mountains, fossils of 19-20, 21 
rocks of 19 
Witherspoon, D.C., work of 7,9 
Wolf Creek, gold on 41, 42 
Wolverine Mountain, fossils on 24 
rocks on 23, 26 
Y. 
Yukon Flats, fossils from 23 
location and description of 11-12 
Yukon River, rainfall on 59 
rocks on 24 
tributaries of 11 
Yukon-Tanana region, location and area of. 9 
Z. 
Zaphrentis, occurrence of t 71 
