INDEX. 
233 
Page. 
|Nome region, water supply of, 1906, paper 
on 182-186 
(Nome River, stream measurements on. . . 184, 185 
[Nome series, deformation of 130 
graphite in 139 
occurrence and character of 129-130, 
160-161, 166-167 
veins in 130-132 
Nonmetalliferous mineral resources of south- 
eastern Alaska, paper on 73-81 
North Arm, copper mining at 09 
[North Star Creek, stream measurements on. 185 
[North Star ditch, description of 169 
Northwestern Mining Company, ditch of 170 
Nugget Creek, gold on 119 
gold mining on 64 
stream measurements on 185 
Nugget Gulcn, auriferous quartz in 198-199 
O. 
Oil. See Petroleum. 
Old Glory mines, operations at 63 
Oliver, R. B., work of 14,.17 
Olympic Mining Company, operations of .. . 63,72 
Omalik Creek, mining on 156 
Ophir Creek, mining on and near . . 148, 150-151, 155 
rainfall at 185 
Ore bodies, auriferous, association of, with 
intrusive granitic rocks 24-25 
Ornamental stones, occurrence and char- 
acter of 73-78 
Otter Creek, mining on 141 
P. 
Pacific coast region, coal beds in 43-44 
geography of 82 
geology of 82-85 
gold production of . .. 21,34 
minerals on 86-87 
physiography of 86 
placer mining in 34 
prospecting on. . .' 86-87 
reconnaissance of, from Yakutat to Al- 
sek River, paper on 82-88 
rocks of 83-85 
structure of 85 
Paige, Sidney, work of 15 
Paige, Sidney, and Knopf, Adolf, paper by, 
on reconnaissance in Matanuska 
and Talkeetna basins 104-126 
Pargon River ditch, description of 150-151 
Paul claim, work on 62 
Pedro Creek, placer mining on 36 
Penelope Creek, mining near 152-153 
Penny River, stream measurements on ... . 185 
Perseverance mine, operations at 55 
Peterson Creek, gold mining on 56 
Petroleum, occurrence of, principles gov- 
erning 97-99 
origin of 98 
paper on, occurrence of, at Controller 
Bay 89-103 
Petroleum wells, drilling of, difficulties 
of 190-101 
Pioneer Gulch, gold in 131 
Page, 
Placer mining, methods of 31-33 
production of gold by, in 1906 31 
work in 33-39 
Placers, occurrence of, relation of certain 
rocks and 131-132 
relative value of lode deposits and 126-127 
Poorman Creek, mining on 119 
Poor Man's copper mines, operations at 68 
Porcupine Creek, mining on 64, 198 
Porcupine Dome, elevation of 189 
Port Clarence limestone, occurrence and 
character of 166-167 
Port Snettisham, gold mining at 58 
"Portage" (Ophir Creek), mining at 151 
Portage Creek, gold on 198 
Portage mines, gold at 59 
Portage Mountain Mining Company, opera- 
tions of 72 
Portland Canal, copper mining on 66 
granite on 77 
Post Creek, mining near. ,. m 155 
Precious metals, geographic distribution of. 22-26 
production of, tables showing 21 
Prince of Wales Island, copper mining on. . 65-71 
galena on 72 
geology of 48 
marble on 75-76 
mineralization on 50 
mining on 62 
Prince William Sound, copper mining on. . . 65 
copper ores of, age of 25 
lode mining on 27 
Prindle, L. M., cited on age relations of 
granitic intrusions and of quartz 
veins 24 
cited on Birch Creek district. . 188, 189, 190, 191 
cited on deposits of stibnite 30 
paper by, on Bonnifield and Kantishna 
regions 205-226 
work of 16 
Publications in 1906, list of 17 
Pumpelly, R. W., work of 14 
Purinton Creek, coal on 110 
coal on, relation of , figure showing Ill 
Puyallup mine, operations at 62 
Q- 
Quartz Creek, mining on 175 
Quartz diorite, occurrence and character of. 106 
Quaternary deposits, occurrence and char- 
acter of 90, 91 
R. 
Rabbit Creek, mining on 163 
Railroads, extensions of 21-22 
projected lines of 28 
Rainbow Creek, mining on 120 
Rampart district, gold production in, 1906. . 37 
placer mining in 37-38 
Rapid Creek, mining on 163 
Ready Bullion gold mine, operations at 52-53 
Red Diamond mines, operations at 54 
Red Wing mines, operations at 59 
Redwood Creek, oil seepages and wells at. 92-94, 97 
Reports in preparation, list of 17-18 
