INDEX. 
525 
P.  Page. 
Palache,  Charles,   and  Jaggar,  T.  A.,  geo- 
logic folios  in  preparation  by. . .       20 
Palmetto  gold  mining  district,  Nevada,  de- 
posits in 116 
Park  City   mining  district,  Utah,  geology 
of 142-146 
ores,  ore  deposits,  and  production  of.  146-150 
Peat,  publications  on  coal,  lignite,  and  list 
of 363-364 
Peat  deposits,  Juneau  gold  belt,  Alaska 42 
Pedro  Creek  and  tributaries,  Alaska,  gold 
placers  on 68-70 
Pennsylvania,  barite  in 515-516 
cement-rock  deposits  in 448-456 
clay  in  Ohio  Valley  of 463-480 
clay  industries  in  Ohio  Valley  of 477-480 
coal  in 295-329 
natural  gas  in 392-412 
petroleum  in 396-412 
Pennsylvania  No.  20  coal  mine,  Pennsylva- 
nia, operations  at 302 
Petroleum,  Alaska 365-371, 376-382 
Colorado 383-391 
origin  of,  conditions  governing 405-411 
Pennsylvania 396-412 
publications  on,  list  of 413 
tests  of,  from  Alaska 370-382 
Phosphates,  publications  on,  list  of 504 
Pittsburg  coal,  coke  from,  analyses  of 324 
elevation  of 312 
general  section  below 399-402 
occurrence  of 311 
quality  of 321-323 
thickness  of 316-321 
Placer  mining  in  Alaska 43-59 
Platinum,  papers  on,  titles  of 168 
Poplar  Lick  coal,  occurrence  and  thickness 
of 263 
Porcupine  placer-gold  mining  district,  Alas- 
ka, description  of 60-61 
development  in 62-63 
geology  of 61 
placer  gold  in,  source  of 61-62 
Pottery,  manufacture  of,  in  Ohio  Valley, 
Pennsylvania 477 
Prindle,  L.  M.,  paper  by,  on  gold  placers  of 
Fairbanks  district,  Alaska 64-73 
paper  by,  title  and  description  of 21 
Professional  Papers,  U.  S.  Geological  Survey, 
character  and  distribution  of..        12 
Provo,  Utah,  slate  at 422 
Pyrite,  publications  on,  list  of 503 
Q. 
Quartz  mining,  Seward  Peninsula,  Alaska, 
description  of 54-55 
Quartz  veins  in  Maine  and  Vermont,  investi- 
gation of,  to  determine  gold  and 
silver  content  of 81-88 
Quicksilver,  papers  on,  titles  of 168 
R. 
Rabbit  Hole  sulphur  mines,  Nevada,  loca- 
tion, geology,  and  production 
of 497-500 
Paee. 
Ragged  Top  mining  district,  South  Dakota, 
ore  deposits  of 138 
Ramparts  region,  Alaska,  placer  mining  in.        58 
Ransome,  F.  L.,  geologic  folios  in  prepara- 
tion by 20 
professional  papers  in  preparation  by..  19-20 
work  of 22 
Red  Spring  coal,  occurrence  and  thickness 
of 261 
Redding   quadrangle,    California,    mining 
and  mineral  resources  in 169-179 
Refractory  materials,  manufacture  of,  in 
Ohio  Valley,  Pennsylvania...  478-479 
Rice,  W.  V.,  aid  by 226 
Rickard,  Edgar,  cited  on  tin  ore  of  Alaska. .      163 
Richardson,  G.  B.,    and   others,   cited  on 
Alaskan  geology 52 
Ries,  Heinrich,  cited  on  Pennsylvania  clays    460, 
468,470,473,475 
cited  on  Conemaugh  formation 475 
Robbins  coal,  occurrence  and  thickness  of.      274 
Rock,  A.  M.,  work  of 22 
Rocky  Fork  district,  Wyoming,  eoal  in  . .  359-361 
Rogers,  W.  B.,  cited  on  Meadow  Branch  coal 
field,  West  Virginia 330 
Rohn,  Oscar,  aid  by 230 
Roofing  slates,  Arkansas,  notes  on 414-416 
Rotten  limestone  of  Alabama,  cement  ma- 
terials in 435-440 
Russell,  I.  C,  cited  on  sulphur  in  Nevada..      497 
S. 
St.  Stephens  limestone  of  Alabama,  cement 
materials  in 440-445 
Salt,    analyses    of,    from    California    and 
Utah 492-495 
deposits  of,  in  Utah 488-494 
publications  on,  list  of 496 
Salt   industry   in    California,    description 
of 494-495 
Salt  sand,  occurrence  and  thickness  of 400 
San  Francisco  Slate  Company  quarry,  Cali- 
fornia, slate  at 421 
Sandstone  Parting   coal,    occurrence    and 
thickness  of 264 
Schrader,  F.  C,  and  Brooks,  A.  H.,  cited 
on  Alaskan  geology 52 
Sea  water,  solid  matter  in,  average  compo- 
sition of 494 
Seabury  mine,  South  Dakota,  ore  deposits 
at 139 
Seaman,  E.  A. ,  cited  on  geology  of  Marquette 
district 217 
Selma  chalk  of  Alabama,  cement  materials 
in 435-440 
Seminole  copper  deposits  of  Georgia,  geol- 
ogy of 182-184,185-186 
veins  and  ores  of 184-185 
Seventymile  River,  Alaska,  placer  mining 
on 57 
Seward  Peninsula,  Alaska,  fuel   and  fuel 
prices  in 50 
gold-placer  mining  in 48-54 
quartz  mining  in 54-55 
transportation  facilities  and  prices  in..  50-51 
wages  and  freights  in 50-51 
