492 
INDEX. 
Page. 
Cave  Canyon,  Cal.,  iron  ores  of 198 
Cebolla  district,  Colo.,  iron  ores  of.  . . .  196,197-198 
Cedar  Canyon,  Utah,  coal  of 299 
Cedar  Mountain,  Ark.,  clays  from,  analyses 
of 409  i 
Cement,  Portland,  bibliography  of 384 
manufacture  of 400,431 
papers  on 374-383 
See  also  Tennessee;  Virginia;  Washing- 
ton; Cumberland  Gap. 
Cements,  Portland,  natural,  and  puzzolan, 
bibliography  of 384 
investigation  of 23 
papers  on 374-383 
Central  district,  N.  Mex.,  copper  of 118 
Channing,  J.  T.,  on  tenor  of  Arizona  copper 
ores 95 
Chanute,  Kans.,  glass  making  at 460 
Chapman,  Pearson,  map  by 35 
Chapman,  R.  H.,  work  of 18,53 
Chatham  region,  Mass..  clays  of 438-439 
Chattanooga  shale,  occurrence  of 173, 375 
Cherokee  Creek,  Ky.,  coal  on,  section  of 268 
Cherry  Creek,  N.  Dak. ,  section  near 319 
Cherry  vale,  Kans. ,  glass  making  at 460 
Chicago  Creek,  Colo. ,  gold  on 36-39 
Chickamauga  limestone,  occurrence  of 173 
Chico  Arroyo  district,  N.  Mex.,  coal  of . . .  251-252 
Chiles  V alley,  Cal. ,  magnesite  near 388-389 
magnesite  near,  analysis  of 390 
Chloride,  Idaho,  history  of 46 
Chloride  Cliff,  Cal.,  ore  deposits  at 72-73 
Chromite  in  black  sands,  occurrence  of. . .  152-156 
Chromium,  bibliography  of 165 
Chrysocolla,  occurrence  of 71 
Chugwater  formation,  gypsum  in 309, 313 
section  of 313 
Clapp,  F.  G.,  on  Nineveh  and  Gordon  oil 
sands,  Pa 362-367 
work  of 302,  432 
Clark,  Samuel,  on  Weber  River  coal 286 
Clays,  analyses  of 407-409,  430 
bibliography  of 448 
papers  on 407-447 
utilization  of 426-427, 429-431 
See  also  Shales;  Arkansas;  Kentucky; 
Maine;  Massachusetts;  Penn- 
sylvania; Tennessee;  Wyoming; 
Penobscot  Bay  region;  Cape 
Cod;  Laramie  basin. 
Clays,  ball,  occurrence  and  character  of. .  423-424 
Clays,  flint,  analyses  of 412 
Clayton, W.,  on  Brigham  Young  oil  spring. .      342 
Clear  Creek,  Colo.,  gold  on 36-38 
Clear  Creek,  Wyo.,  coal  near 306 
Clear  Creek  mine,  Utah,  coal  of 298-299 
analysis  of 294 
Clearfield  coal  field,  Pa.,  coal  of 271-275 
geology  of 271-275 
map  of 272 
production  of 275 
Clifton-Morenci  district,  Ariz.,  description 
of 101-102 
See  also  Morenci. 
Clinton  iron  ores,  analyses  of 181 
bibliography  of 181 
Page. 
Clinton  iron  ores,  character  of 173 
descriptions  of.. . .  173-179, 180-181, 183, 187-188 
origin  of 172-173 
Cloud  Peak,  Wyo.,  gold  near 308 
Cloverly  formation,  coal  in 311 
gypsum  in 313 
section  of 313 
Coal,  analyses  of 221-222, 
229-234, 236-238, 258, 263, 288,  294 
analytic  work  on 206-207 
bibliography  of 354-356 
character  of 221 
classification  of 208 
investigation  of 22-23, 203-210 
mining  of 220 
occurrence  of 79 
papers  on 203-354 
production  of 203 
sampling  of ...  206-208, 229 
sections  of 214-220,227, 
229-231,  233,  236,  243-257,  262- 
263, 265-269, 286, 297, 300, 311, 312 
See  also  Alabama;  California;  Colorado; 
Kentucky;  Montana;  New 
Mexico;  North  Dakota;  Penn- 
sylvania; Utah;  Warrior  coal 
basin;  Mount  Diablo  Range; 
Yampa  field;  Engle  field;  Du- 
rango-Gallup  field;  Kenova 
quadrangle;  Bear  Creek  field; 
Clearfield  field;  Punxsutaw- 
ney  field;  Glen  Campbell  field; 
Weber  field;  Book  Cliffs  field; 
Bighorn  Mountains;  Bighorn 
basin. 
Coal,  anthracite,  occurrence  of 22, 236-239 
See  also  Yampa  field. 
Coal  Canyon,  Utah ,  coal  of 296 
analyses  of 294 
Coal, lignite, and  peat,  bibliography  of...  354-356 
papers  on 203-354 
Coal  Measures,  clays  of 411-416 
shales  of 375-376 
analyses  of 376 
Coal-mining  machines,  use  of 279 
Coaldale,  Ala.,  coal  at,  section  of 219 
Coal-testing   plant,    distribution    of   coals 
tested  at 209 
work  at 22, 203, 206-210 
Coalville,  Utah,  coal  at 285-288 
coal  at ,  analyses  of 288 
Cobb  coal,  occurrence  and  character  of 214 
Cody,  Wyo.,  coal  at,  section  of 311 
Cody  Coal  Company,  mine  of 311 
Cody  Hot  Springs,  Wyo.,  waters  of ,     314 
Cceur  d'Alene  region,  Idaho,  work  in 18 
Cceur  d'Alene  series,  description  of 43 
occurrence  of 41 
Coffey ville,  Kans. ,  glass  making  at 460 
Collier,  A.  J.,  on  copper  on  St.  Joe  River, 
Idaho 129-139 
work  of 18, 129 
Colorado,  coal  in 204-205, 226-239, 241-247 
coal  in,  analyses  of 229-234, 236-238 
location  of,  maps  showing 226, 242 
copper  in 106-107, 125-128 
