INDEX. 
617 
Page. 
Ruggles-Coles  drier,  use  of 505 
Russia,  copper  production  of 222 
lead  production  of 252 
zinc  production  of 253 
tin  in,  occurrence  of 178 
publications  on 185 
Rustler    Spring,    Tex.,    sulphur    deposits 
near 589-592 
S. 
Saccharoidal  limestone,  correlation  of 234 
St.  Elizabeth  formation,  correlation  of 231 
Ste.  Genevieve,  Mo.,  copper  mines  at 234 
St.  George,  Colo.,  silver  near 228 
St.  Joseph  limestone,  occurrence  and  char- 
acter of 259 
St.  Peter  limestone,  occurrence  and  charac- 
ter of  234 
St.  Regis  formation,  character  and  extent 
of 280, 281-282 
Salt,   analysis  of,    from    El    Paso    County, 
Tex 579, 580 
in   Trans-Pecos,  Tex.,  occurrence  and 
character  of 578-580 
in  Watkins  Glen  district,  N.  Y.,  occur- 
rence and  development  of 567-576 
near  Zuni,   N.   Mex.,   occurrence    and 
character  of 565-566 
publications  on .' 586 
Salt  basin,  Tex.,  topography  of 574 
Salt  Creek  oil  pool,  Kans.,  location  and  ex- 
tent of 452 
Salt  Islands,    La.,  mounds  on,  indicating 
oil  deposits 464-465 
Salt  Lake  basin,  Utah,  asphalt  and  oil  pros- 
pects in 468-479 
Salt  Lake  City,  natural  gas  near 480-483 
San  Andreas  Mountains,  N.Mex.,  copper  in.      226 
San  Antonio,  Tex.,  oil  fields  near 461 
Sandia  Mountains,  N.  Mex. ,  copper  in 226 
San    Francisco  Mountains,  Utah,  geology 
of 244-247 
location  of ■ 242 
ores  of 242 
San  Juan  district,  Colo. ,  work  in 26 
San  Juan  Mountains,  area  and  character  of.        51 
San  Juan  tuff,  age  of 75 
occurrence  and  character  of 53 
San  Raphael  Swell,  Utah,  location  of 228 
vanadium  and  uranium  near 208-210 
Santorin,  use  of 503 
Saratoga  oil  field,  Tex.,  depth  of  oil  in 161 
production  of 460 
Savanna  formation,  occurrence  and  char- 
acter of 385 
Sceptre  mine,  Colo.,  siderite  in 108 
Sceptre  vein,  Georgetown,  Colo.,  section  of, 
figure  showing 112 
Schist,  Colorado,  occurrence  of 101 
Schmitz,  E.  J.,  on  copper  deposits 225 
Schrader,  F.  C,  work  of 30 
Schrader,  F.  G,  and  Haworth,  Erasmus, 
paper  by,  on  clay  industries 
of  Independence  quadrangle, 
Kans 546-549 
Page. 
Schrader,  paper  by,  on  Portland  cement  re- 
sources of  Independence  quad- 
rangle      506  .Ml'.) 
on  oil  and  gas  in  Kansas 446-158 
Seattle,  Wash.,  clay  deposits  near 552-  555 
Sea  water,  copper  in 223 
Selma  chalk,  analyses  of 520 
occurrence  and  character  of . .  510-515, 518-520 
soil  from,  character  of 516 
Sewell  coal,  occurrence  and  character  of.  424-426 
Shale,  analysis  of 509 
analyses  of 538 
Shaler,  M.  K.,  and  Taff,  J.  A.,  paper  by,  on 
Muscogee  oil  fields,  Ind.  T  ...  441-445 
Shenandoah  limestone,  character  and  ex- 
tent of,  in  Valley  of  Virginia. .  533-534 
Shishi  Beach,  Wash.,  placer  mining  at...  155-156 
Shumard,  B.  F.,  on  copper 233 
Shuqualak,  Miss.,  limestone  near,  analysis 
of 518 
Siberia,  tin  in 170 
Siderite,  occurrence  of,  in  Idaho 297 
Sierra  Diablo,  Tex.,  stratigraphy  of 576 
topography  of 575 
Silica  in  natural  cement,  percentage  of 501 
in  Portland  cement,  percentage  of 199 
in  slag  cement,  percentage  of 505 
Silver,  minerals  associated  with . .  100, 107, 109, 110 
ores  of,  in  Colorado 107, 110 
analyses  of 143 
in  Georgetown,  Colo.,  mining  dis- 
trict, value  of,  per  ton,  as  ship- 
ped        100 
prices  of 261 
production  of,  in  United  States 39   1 1 
Silver  native,  occurrence  of,  in  Colorado..      107 
Silver,  ruby,  occurrence  of 60,  62,  81 
Silver-bearing  veins,  occurrence  and  char- 
acter of 56-64, 80-82 
Silver-lead  ore,  Idaho,  cost  of  mining 299 
Silver  and  gold,  publications  on,  list  of ..  158-160 
Silver  Plume  district,  Colo.,  work  in 26 
Silver  Plume  mine,  veins  in,  nature  of 109 
Silver  Reefs,  Colo.,  location  and  character  of  228 
Silver  Shield  mine,  Utah,  developments  at.  240 
Silverton  mines,  Colo.,  lead  in,  production 
of 256 
Sin  bad  Valley,  Colo.,  reconnaissance  in 227 
Singkep,  tin  in 168 
Skeats,    E.    M.,    on    sulphur    deposits    in 
Texas 589,  590 
Slag,  blast  furnace,  analysesof 504 
use  of 497, 500, 501, 503 
Slag  cement.    See  Cement,  slag. 
Slate,  investigations  of,  during  1904 486-488 
Slate  industry,  work  on 31 
Slate  prospects,  Mo.,  character  of 235 
Smith,  A.  F.,  and  Ball,  S.  II.,  on    Missouri 
lead  260 
Smith,  E.  A.,  section  reported  by 510 
Smith,  c.  <  i.,  paper  by,  on  granite  industry 
of   Penobscot    Bay  quadrangle, 
Me 489-492 
paper  by,  on   molybdenite  in   eastern 
Maine L97   L99 
work  of 31 
