INDEX. 
195 
Page. 
rertiary rocks, occurrence oi 101 
thanksgiving Creek, location and charac 
terof 118-119 
I'l' lis Creek, location of 172 
rhetis group, location of 173 
mines of 1 79 
rhompson, W., information from l si 
rhompson, Cape, coal at 183 
rhompson Creek, coal on L65 L66 
rin City, location of 124 
rin Creek, tin on . 121 
work on 123-124 
I'iii deposits, location of 120 
lode deposits of 121-125 
occurrence of 32 
placers of 126-127 
Topkok district, placers of, character of... 36 
ropkok Ditch Company, work of 22-23 
Eopographic work, progress in 15 
Trail ('reek, oil well on 136 
Tram ways, cost of 11 
Transportation, cost, difficulty, and means 
of 19, 
24, 26, 28, 30, 31, 88, 93j L04, 105,111,115 
Travers Creek, coal at 155 
Tread well, location and population of 69 
Tread well mines, character of 69-87 
developments and methods at 52-53 
geology near, maps showing 71 
ores, bodies of 70-87 
character of 77-78 
dikes in i 84 85 
fractures in, origin of 85-86 
metasomatic alteration in 83-84 
minerals in 77-78, 81^82 
persistency of-. 70, 87 
shape of 78-79 
value of 78 
reining of 79-80, 87 
waters of, source of 79,86 87 
ores of 50, 52 
production of 52 
Set also Mexican, Alaska, Treadwell, 
and Ready-Bullion mines. 
Triassic rocks, occurrence of 1 35 
Trinity Islands, coal on 163 
Troublesome Country, location of 106 
Troublesome Creek, location and character 
of i08 
Troublesome Gulch, coal at 155 
Trout Creek, coal on 144,141',. Ms 
section on 1 44 
iFurnagain Arm, location of 90 
tides of '.i I 
rurnagain Arm region, copper in 99 
geography of 90-93 
geology of 93-94 
gold of 94-98 
investigations in 16 
location of 90 
lodes of 98 
map of 91 
methods in 95 
mines of 95-98 
placers of 95 98 
production of 90 
Page. 
Twin Creek, placers on, character of 39 
Tyonok, coal at L51, L53 155 
U. 
Qgashik Lake, coal reported al 162 
Unalaska, lode near 102,103 
Qnalaska Island, development of L03 
geolpgy of 1U2 L03 
location of 102 
lodes of 103 
topography of L02 
Unga conglomerate, occurrence of L68 
Unga Island, coal at, analyses of L51 L53, 
167-168, 170, 171 
rocks of 100-101 
V. 
Valparaiso claim, ores of 
Venetian Creek, work on 
Virginia claims, character of. 
W. 
Wade Creek, work on 
Wages, rates of 20,21,40, 
Wainwright Inlet, rocks at 
Walker Fork, work on 
War Horse mine, developments and meth- 
ods at 
Ward Creek, work on 
Washburne, Chester, on Cape Lisburne 
coal 
Washing plant, necessity for 
Washington coal, analysis of 
Washington ( 'reek, gold on 
Waste in placer mining. See Mining, placer. 
Water, cost of 
pumping of 
Water supply, necessity for 
Watergate, use of 
Wellington coal, cost of 1 
Welsh coal, analysis of 
Wetherbee, J. L., acknowledgments to 
Whalers Creek, coal on 
section on 
Wharf, E. G., acknowledgments to 
What Cheerbar, location and characterof. 1 
White channel gravels, productiveness of.. 
Wild Goose Co., met hods of 
Windfall Creek, gold at 
Windham Bay, gel 1 at 
work at „ 
Wiseman Creek, gold on 
Witherspoon, 1). C. work of 
Woewodski Island, mines on 
ores of 
Wolverine Mountains, rocks of 
Wood, cost of 
Wood choj .per Creek, work on 
Woronkofski I s la i id, rocks on 
Wosnessenskij Ilia, on Alaska coal 
Wrangell mining district, location of 
minesof, developments and met hods a t . 
ores of 
Wright, C. W.. on southeastern Alaska 
work oi 15-16, 
30 
89, 101 
177 
30 
55 
23 
182 
41 
171 
29 
41 
13, 15 
19 
45 
53,171 
1 17 
L52 
165 
165 
L52 
1 .Villi 
25, 38 
21 
51 
53 
17 
59 
51 
lid 
II 
2'. I 
60 
151 
59 
59 61 
51 
47-68 
17,70 
