INDEX. 
503 
Page. 
St. Peter  sandstone, use  of,ing!ass making.  464, 4GG 
St.  Regis  formation,  occurrence  and  char- 
acter of 43,131 
Salt,  bibliography  of 400 
Salt  Creek,  Wyo.,  petroleum  on 310 
Salt  Lake  oil  field,  Cal.,  development  of... .  360-361 
geology  of 357-360 
map  of 358 
oil  of 359-361 
section  in 359 
Sam  White's  pit,  Wyo.,  bentonite  of 447 
San  Andreas  Range,  N.  Mex.,  rocks  of 83 
San   Juan    Islan't,    Wash.,    limestone   and 
shales  on 377-378 
analysis  of 378 
San  Juan  Mountains,  Colo.,  work  in 18 
San  Pedro  Mountains,  N.  Mex.,  ores  of.  82-83,117 
San  Rafael  Swell,  Utah,  shale  of 290 
Sand,  glass.    Sec  Glass  sand. 
Sand  Creek,  N.  Dak.,  lignite  near,  section 
of 324 
Sand  Creek,  Wyo.,  bentonite  on 447 
Sands,  black.    See.  Black  sands. 
Sandwich  region,  Mass.,  clays  of 440 
Sanpete  coal  field,  Utah,  map  of 280 
work  in 22 
Satterlund  mine,  N.  Dak.,  lignite  of,  analy- 
sis of 323 
Sayre,  Ala.,  coal  at,  section  of 216 
Sayreton,  Ala.,  coal  at,  section  of 216 
Schailer,  W.  T.,  work  of 160 
Schrader,  F.  C,  on  copper  deposition 86 
on  Durango-Gallup  coal  field 241-258 
on  geology  of  Independence  quadrangle.       470 
work  of 74,  204 
Schultz,  A.  R.,  work  of 205,331 
Sciotoville  clay,  analyses  of .• 412 
description  of 411-412 
sections  of 411 
Scofield,  Utah,  coal  of 297-298 
Scope  of  volume 7 
Searchlight  district,  New,  work  in 18 
Sedimentary  rocks,  copper  in 86 
Sentinel  Butte,  N.  Dak.,  section  at 318 
Serpentine,  magnesite  in 386-387 
Seven  Devils  district,   Idaho,  copper  ores 
of 108-109 
Sevier  mine,  Utah,  data  on 88-90 
Shaler,  M.  K.,  work  of 204 
Shales,  analyses  of 375-376, 378-382 
investigation  of 23 
See  also  Clays. 
Shasta  King  mine,  Cal.,  copper  of 106 
Sheridan,  Wyo.,  coal  near 303-304 
coal  nea  r,  section  of 303-304 
Shinbone  Ridge,  Ala.,  iron  mines  on 178 
Shoshone  Forest  Reservation,  extension  of.      129 
Shoshone  mine,  description  of 49 
ores  of 50 
Shoshone  River,  Wyo.,  sulphur  on 315 
Shuster  mine,  Colo.,  coal  of,  analysis  of 229 
section  of 229 
Siebenthal,  C.  E.,  on  bentonite  of  Laramie 
basin 445-447 
work  of 23 
Silica,  Mo.,  glass  sand  at 469 
Page. 
Silica  Sand  Co.,  glass  sand  of 475 
Silliman,  B.,  on  Mack  sands 150 
Silver  and  gold.    See  Gold  and  silver. 
Silver  Bell  Mountains,  copper  mines  of.. .  102-103 
Silver  Bow,  New,  ore  deposits  of 65-66 
Silver  Butte  mine,  Mont.,  description  of ...        50 
Silver  City  district,  N.  Mex.,  copper  ores  in..       118 
Silver  Tip  mine,  Wyo.,  coal  of 31 1-312 
Silverton,   Colo.,  gold  and  silver  deposits 
near,  description  of 25-27 
Sims,  N.  Dak.,  lignite  of,  analysis  of 323 
Sinbads  Valley,  Colo.,  rocks  at 126 
Sixmile  Creek,  Utah,  coal  on 283-284 
Slate,  investigation  of 24 
new  variety  of,  description  of 449-450 
See  also  Maine. 
Smelting,  improvements  in 95-96 
pyritic  method  of 95-96 
use  of  copper  in 95 
Smith,  D.  C,  work  of 206 
Smith,  G.  O.,  on  graphite  in  Maine 480-483 
work  of 24,  449, 480 
Smith,   W.   S.   Tangier,   on   Wyoming  iron 
ores 194-195 
Smith-Kenmare  Dry  Coal  Co.,  N.  Dak.,  lig- 
nite of,  analyses  of 323 
Snake  River,  Oreg.,  copper  on 119 
Snowstorm  mine,  Idaho,  copper  ores  of 108 
Soda,  bibliography  of 406 
Soda  Creek,  Colo.,  gold  on 36-38 
hot  springs  on 38 
Soldier  Canyon,  Utah,  coal  of 296 
Soldier  Creek,  Wyo.,  gypsite  on 405 
Soldier  Summit,  Utah,  ozokerite  near 369-371. 
South  Boulder  Creek,  Colo.,  gold  on 37-38 
South  Dakota,  copper  in,  gold  and  silver  in.        95 
lignite  in 316 
lignite  in,  analyses  of 322 
Southern  Cross  tunnel,  Colo.,  description  of  32-33 
section  at 33 
Southern  Klondyke,  New,  ore  deposits  at..        58 
Spencer,  A.  C,  on  Encampment  district  ores      124 
on  Wyoming  deposits 81 
work  of 1 7, 21 
Sportsman  Lake,  Wyo.,  gypsum  at 404 
Spring  Canyon,  Utah,  coal  of 295, 297 
Spring  Mountains,  New,  zinc  in 166 
Spring  Valley,  Wyo.,  coal  at 337 
coal  at,  analysis  of 340 
oil  at,  analysis  of 351-352 
oil  wells  at  and  near 343, 345-347, 349 
relations  of  Hilliard  Springs  and, 
section  showing 350 
Spurr,  J.  E.,  on  Aspen  district 169 
on  Spring  Mountains,  Nev 166 
resignation  of 17 
work  of 18, 35 
Spurr,  J.  E.,  and  Garrey,  G.  II.,  on  Idaho 
Springs  mining  district 35-40 
Squaw  Bay,  Idaho,  lime  at 47 
Stanley  mine,  Colo.,  ores  of 39 
Sterling,  Utah,  coal  near 280, 283-284 
coal  near,  analysis  of 284 
section  of 283-284 
figure  showing 280 
Sterrett,  D.  B.,  work  of 160 
