INDEX. 
L89 
Page. 
Jpok Inlet, investigations at 15-16,31 
I location of 90 
I petroleum field at 133-134 
H railway to 31 
rocks at 152 
surveys at 15 
well at, record of 133 
x>k Inlet Coal Fields Company, work of 152-153, 
156-157 
Doper Creek, location and character of . . . 92 
placers of 98 
xxs Bay, coal of, analysis of 171 
jpper, occurrence of 51, 60-64, 99, 100, 114 
jpper Mountain, copper at 51 
)pper Mountain-Sulzer mines, ores of 64 
>pper River region, conditions in 31 
investigations in 16 
arwin Bluff, coal at 173, 177-179 
rocks in 176 
orwin formation, character of 175-176 
I occurrence of 175-177 
orwin Trading Company, work of lsl 
ost of placer mining. See Mining, placer, 
cost of. 
ottonwood Creek, coal on 158-159 
section on 159 
ouncil City and Solomon River Railway, 
operation of 22 
ouncil region, placersof, character of 35 
work in 23 
rackerjack mine, ores of and develop- 
ments at 66 
retaceous rocks, occurrence of 152, 154, 165 
ripple Creek region, work in 21 
rooked Creek, work on 23 
row Creek, location and character of 92, 97 
placers of 97 
urtis coal seam, location of 158 
D. 
>ahl Creek, work on 24 
)all, W. H., on lignite and coal in Alaska. 49 
151, 158, 161, 163, 164, 166, 168, 169 
on Unalaska rocks 102 
)all Island, mines on, character of 65, 67 
)an Creek, mining on, costs of 44,46 
)aniels Creek, work on 22-23 
)arby Mountains, tin from 125 
)awson, G. M., on diorite 76 
)eadwood Creek, placers on, character of. . 39 
)erricking, cost of 44, 45 
)evonian rocks, occurrence of 110 
)exter Creek, methods on 21 
)ickson, railway from 22 
)ikes, occurrence of 69-77 
Hller, J. S., analysis given by 171 
)iorite, occurrence of 48 
See also Albite-diorite. 
)iscovery Fork, work on 29-30 
at. 
)itch system, cost of 
)olomi, development 
ores at 
)oric Creek, location and character of 
)oroshin, P. P., on Alaskan coal 
on Alaskan placers 
)orothy Creek, methods on 
)ouglas, location and population of... 
40 
64-66 
51 
116 
151 
90 
21 
69 
Page. 
Douglas, Cape, coal on 160-161 
Douglas Island, gold ores of 50, 52, 70-87 
mines on and rocks of 69-70 
Douglas River, mouth of, character of 1 38 
oil at ] 38 
Dredging, cost of 11, 15 
Drift mining, definition of 32 
See also Mining, placer. 
Dry Bay, oil at 134, 136 
Duncan Canal, mines on, character of and 
developments at 59-60 
Dutch Harbor, rocks near 102-103 
Dyer Cape, coal at 183 
E. 
Eagle district, conditions in 29-30 
cost of mining in 15 
placers of, character of 35 
Eagle River, work on 51 
Eagle River Mining Co., mine of, develop- 
ments and methods at 54 
Ears Mountain, tin at 125 
Eastland Canyon, coal in, analysis of 170 
Ebner mine, developments at 53 
Economic geology, contributions to, publi- 
cation of 13 
Eldorado basin, work in 22 
Eldridge, G. H., on Tyonok coal 154 
Electricity, use of 40 
Elk claims, character of 67 
Elluvial mining, definition of 33 
Emerson, B. K., on Unalaska Island geol- 
ogy 102 
Endicott arm, gold ores on 50 
Enochkin formation, occurrence and char- 
acter of 134, 135 
Eocene rocks, occurrence of 49, 128 
Eureka Creek, location and character of. . . 117 
Exchange mines, location and character of. 60 
F. 
Fairbanks, location of 26 
population of 26 
Fairbanks Creek, developments on 27-28 
methods on 39 
Fairbanks region, accessibility of 26 
conditions in 25-28, 37 
cost of mining in 28, 43 
developments in 27-28 
investigations in 15 
methods in 39-40 
placers of, character of 35, 39 
production of 25-26, 28 
tin in 127 
water supply of 26 
Fairhaven precinct, placers of, character of. 36 
work in 24 
Falls Creek, coal on 159 
Faults, figure showing 76 
Flambeau River, ditch from 22 
Florida Creek, gold on 108, 113 
Ford, G. T., work of 17 
Fortymile region, conditions in j'.t:',(i 
cost of mining in 43 
gravels of 25,38 
placers of, character of 36 
water supply of 25 
