INDEX. 
503 
Page. 
Sheridan,  Pa.,  quarry  near,  section  at 349 
Shippensville,  Pa.,  clay  near 341 
Side  rite,  occurrence  of 197,204 
origin  of 198 
Sierra  Nacimiento,  N.  Mex.,  geology  of...  261-262 
gypsum  near,  paper  on .  260-265 
Silurian  sandstones,  use  of,  as  glass  sand. . .    364- 
365,367 
Silver  and  gold,  papers  on. 
26- 
Survey  publications  on 89-92 
Silver  Cliff  mine,  Wyoming,  copper  ores  at. .       104 
Silver  Star  tunnel,  Colo.,  ores  at 28 
pLverton  mining  district,  Colo.,  Lake  Fork 
extension  of,  paper  on 26-30 
Simons,  F.  D.,and  Crampton,  C.  A.,  quoted 
on  fuller's  earth 284, 279-280, 284   ! 
Simpson,  J.  II.,  cited  on  gypsum  in  New 
Mexico 260,265 
Sioux  City,  Iowa,  glass  sand. near 378-379 
glass  sand  near,  analysis  of 382  | 
Sisquoc,  Cal.,  diatomaceous  earth  near ^44 
Sixmile  Bar,  Columbia  River,  gold-bearing 
gravels  at 64 
Sleepy  Cat  Mountain,  Colo.,  geology  of  re- 
gion at  and  near 112-113 
Sligo,  Pa.,  clay  near 338,341,342 
Sligo  Fire  Brick  Company,  clays  of,  anal- 
yses of 340 
Sloan,  Earle,  quoted  on  fuller's  earth 279 
Sloss  Iron  Company,  quarry  of,  dolomite 
from,  analysis* of 253 
quarry  of,  limestone  from,  analyses  of. .      251 
Sloss-Sheffield   Steel  and    Iron    Company, 
mines  of 157 
ores  of,  analyses  of 154 
quarry  of ,  limestone  from,  analysis  of. .      248 
Smectite,  analysis  of 276 
Smith,  E.  A.,  analyses  by 176 
cited  on  rocks  near  Columbiana,  Ala ...      173 
Smith,    E.    E.,   work   done   in  conjunction 
with 71,74 
Smith,  G.  O.,  cited  on  geolog}   of  part  of 
Washington 58 
cited  on  mica  production 400 
note    by,    on    a    mineral    prospect    in 
Maine 118-119 
Smith,  G.  O.,  and  Calkins,  F.  C,  cited  on 
geology  of  part  of  Washington.        59 
Smith,  P.  S.,  paper  by,  on  gray  iron  ores  of 
Talladega  County,  Ala 161-184 
Smith,  W.  S.  T.,  report  by,  containing  refer- 
ences to  copper  deposits  in  Wy- 
oming., reference  to 93 
Smith,  W.  S.  T.    and  Darton,  N.  II.,  cited 
on  Guernsey  formation 102 
Smiths  Fork,  Wyo.,  phosphates  on 456-457 
Snake  River,  gold  placers  on,  gold  values  in.  83-86 
gold  placers  on,  platinum  in 87-88 
source  of  gold  of 88 
work  on 71-88 
Soda,  Survey  publications  on 267 
Sonnhalter    Sand    and     Stone    Company, 
quarry  of 373,374 
Page. 
Sorenson  gold  diggings,  Snake  River,  opera- 
tions at 80 
Soudan  mine,  Minn.,  copper  at 101 
South  Fork,  Pa.,  clays  and  shales  near.. .  350-352 
South  Mountain,  Pa.,  clays  of,  paper  on. .  322-334 
map  of  part  of 327 
Spechts  Ferry,  Iowa,  section  of  Platteville 
rocks  at 228 
Spencer,  A.  C,  paper  by,  on  magnetite  de- 
posits in  Pennsylvania 185-189 
work  of 22,185 
Spencer  siding,  Wyo.,  shale  near,  analysis 
of 238 
Stansbury,  Howard,  quoted  on  iron  ores  of 
Iron  Mountain,  Wyo 207 
Stanton,  T.  W.,  fossils  studied  by 72 
Steiger,   George,  analyses  and  tests  made 
by 114,124,126 
Stein,  Joseph  L.,  acknowledgments  to 93 
Sterrett,  D.  B.,  paper  by,  on  mica  deposits 
in  western  North  Carolina 400-422 
work  of 24 
Stockade   Beaver  Creek,    Wyo.,   limestone 
near,  analyses  of 235-236 
Stockbridge  dolomite,  occurrence  of 394 
Stose,  G.  W.,  paper  by,  on  clays  of  South 
Mountain,  Pa 322-334 
paper  by,  on  phosph  ^rus  ore  at  Mount 
Holly  Springs,  Pa 474-483 
work  of 25 
Stranger  Creek,  Columbia  River,  gold-bear- 
ing gravels  at  mouth  of 67 
Strasburg,  Ohio,  glass  sand  at 374 
Strattonville,  Pa.,  clay  near 338, 342 
Structural  materials,  work  on 23-24 
Sublette  Range,  Wyo.,  phosphates  in 450, 457 
structure  of 453 
Sugar  Pine  Creek,  Utah,  phosphates  on 455 
Sullivan,  E.  G,  analyses  by 209,348,352,487 
cited  on  origin  of  copper  ores 105 
cited  on  Wyoming  graphite 427 
Sulphur  and  pyrite,  papers  on 483-489 
Survey  publications  on 490 
Sulphurdale,  Utah,  sulphur  at  and  near 483 
Sunrise  copper  mine,  Wyo.,  output  of 99 
rocks  and  ores  at 99-101 
Sunrise  mine,  Wyo.,  production  of 193 
Swan  Lakes,  Idaho,  phosphates  near 461-462 
Swingle  (J.  S.)  quarry,  granite  of,  composi- 
tion of 358 
Sycamore,  Ala.,  hematite  near,  analysis  of. .      176 
Sylvania,  Ohio,  glass  sand  at 367,370-371 
glass  sand  at,  analysis  of 376 
Sylvania  sandstone,  use  of,  for  glass  sand.  370-371 
Symons,  T.  W.,  cited  on   placer  mining  on 
Columbia  River,  Wash 56 
T. 
Tallaseehatchee  mine.    See  Mesaba  mine. 
Tanyard  Gap,  Ala.,  geologic  section  in 138 
geologic  relations  and  development  of.  433-434 
Tennessee,  hematite  in,  mining  of 430-431 
hematite  in,  use  of,  in  paint 430 
