192 
INDEX. 
Page. 
Mammoth Creek, work on 29 
Mammoth mines, character of and develop- 
ments at 55 
Map of Alaska 14 
of Alaska, southwestern 156 
of Bering River coal field 142, 143 
of Kachemak Bay 156 
of Rampart placer region 105 
of Turnagain Arm placer region 91 
Marble, occurrence of 48-49, 61, 68 
Margery claims, ores of 61 
Marryat Inlet, port at 183, 185 
Marsh, S. J., information from 183 
Martin, G. C, on Alaska petroleum fields.. 16, 
128-137 
on Bering River coal 140-150 
on Cape Yaktag placers 88 
on Shumagin Island gold 100 
on Unga Island coal 167-168 
work of 16, 151 
Mary Creek, character of 130 
Mastodon Creek, work on 29 
Matanuska River, coal on 151, 153-154 
coal on, analysis of 170 
location and geology of 153 
Mendenhall, W. C, on Copper River region. 16 
on Matanuska River coal 153-154 
on Sunrise series 93 
Mesozoic rocks, coal in 176-181, 184 
occurrence of 101, 133, 175-176 
Methods of placer mining. See Mining, 
placer, methods of. 
Mexican mine, developments and methods 
at 52-53 
location of 69 
Miller's camp, rocks and developments at. . 65, 67 
Mills Creek, location and character of. . . 92, 96-97 
placers on 96-97 
Mineral deposits, occurrence of, investiga- 
tion of 13-14 
Miner's inch, equivalents of 41-42 
Mining, alluvial, definition of 33 
See also Mining, placer. 
Mining, drift, definition of 32 
See also Mining, placer. 
Mining, gravel, definition of 32 
See also Mining, placer. 
Mining, hydraulic, definition of 32 
See also Mining; placer. 
Mining, open-cut. See Mining, placer. 
Mining, placer, account of 18-31 
cost of 15, 19, 28, 41-46 
method of calculation of 42-43 
definition of 32 
difficulties of 36-38 
financial results of 18-19, 37 
influence of geology and topography 
on 38 
investigation of 15 
methods of 32-40 
mistakes in 36-37 
waste in 19 
Minook Creek, gold on 107, 114 
location and character of 107-108 
rocks on 109-110 
Page. 
Mint, Director of, on Alaska placer gold 
production 18 
Miocene Co., methods of 21 
Miocene rocks, occurrence of. . 89, 100-101, 128, 168 
Mittendorf, , coal reported by 162 
Moffitt, F. H., on Cook Inlet region 31 
on Turnagain Arm placers 90 
work of 16 
Moose Creek, coal on 154 
Moria Sound, rocks at 62 
Morris. Captain, acknowledgments to 152 
Mosquito Fork, water from 30 
Mount Andrew mines, location of and de- 
velopments at 63 
Mount Vista claims, character of 67 
Murder Cove, coal at 56-571 
N. 
Naknek formation, occurrence and char- 
acter of 131, 135 
Nanaimo coal, analysis of 147, 171 
Navy Department, attempts to find coal by. 56 
Nevada Creek, gold ores at 50 
New South Wales coal, analysis of 147 
New York ledge, character of 64 
Niblack, copper at 51 
Niblack Anchorage, location of 62 
Nickel, occurrence of 61 
Niuluk River, work on 23 
Nizina district, cost of mining in 44 
developments in .' 31 
placers of, character of 36 
Noatak River, rocks on 183 
timber on 173 
Nome, conditions at 19 « 
fuel at 41 
methods at 20 
placers of, character of 35-361 
predictions concerning 14 
production at 20 
surveys at 15 
tin near 127 
uplift at 14 
Nome Arctic Railway, extension of 21 
Nugget Creek, developments and methods 
on 52 
O. 
Oil Bay, oil at, character of 137-1381 
oil well at, record of 133 
Oligocene rocks, occurrence of. . . 121, 142, 152, 1681 
Oliphant, F. H., on Controller Bay oil 
wells 131-133 
Oliver, R. B., work of 16 
Olympic Mining Co., mines of, develop- 
ments of 59-60 
Omega Creek, location and character of . . . Ill 
Open-cut mining. See Mining, placer. 
Ophi r Creek, cost of mining on 44J 
production on 20 
work on 23 
Oregon coal, analysis of 171 i 
Oregon ledge, character of 64J 
Ores, gold, classes and occurrence of 50-51 
( )sborn Creek, work on = 22l 
