INDEX. 
A.  Page. 
Abingdon,  Va.,  iron  ores  at 193 
Abrasive  materials,  bibliography  of 484 
Acme  Cement  Plaster  Co.,  Wyo.,  mine  of. . .       405 
Adams,  John,  ores  discovered  by 66 
Adaville  coal,  Wyo.,  analyses  of 339,341 
occurrence  of 337-338 
Adrian  coal  mine,  Pa.,  production  of . . . .  278-279 
Alabama,  coal  in 204,211-222 
coal  in,  sections  of. 212,214-220 
iron  ores  of 172-179 
analyses  of 174-179 
sections  of 174, 176-178 
sections  in 173, 175 
work  in 21-22, 204 
See  also  Warrior  coal  field. 
Alabama  Consolidated  Coal  and  Iron  Co., 
mines  of 177-178 
Alabama    Geological   Survey,   cooperation 
with 21 
Alaska,  copper  in 97-98 
copper  in,  production  of 93 
economic  papers  on,  publication  of 7 
Alesna  Peak,  N.  Mex.,  coal  near,  section  of. .      252 
Algonkian  rocks,  occurrence  of 41-42 
Allegheny  formation,  clays  of 413-416, 442-444 
clays  of,  analyses  of 415 
sections  of 413-414 
coals  of 276 
Allen,  R.  C,  work  of 204 
Allison,  J.  R.,  on  Colorado  hot  springs 36 
Almy,  Wyo.,  coal  at 338 
Altamont,  Wyo.,  oil  wells  at  and  near 345 
Alton,  111.,  glass  making  at 460 
Altoona,  Kans.,  glass  making  at 460 
Aluminum,  bibliography  of 171 
discoveries  of 171 
investigation  of 21 
American  Window  Glass  Co.,  glass  sand  of, 
analyses  of 454 
American  Magnesite  Co.,  mine  of 387 
plant  of 391-392 
Anaconda  mine,  Mont.,  developments  in. ..      113 
Analyses.    See  particular  substances. 
Animas  Mountain,  Colo.,  volcanic  ash  near.       476 
Annie  Laurie  gold  mine,  Utah,  description 
of 87-90 
developments  at 87-88 
ore  deposits  of 88-90 
production  of 87 
rocks  of 88 
study  of 19 
Anniston  district,  Ala.,  work  in 21 
Anthracite  coal,  occurrence  of 22, 236-339 
Page. 
Anthracite  field,  Colo., coal  of,  analyses  of.  237-238 
description  of 236-239 
Antimony,  occurrence  of 51 
Appalachian  region,  copper  deposits  of 17,96, 
107,119-120 
copper  deposits  of,  gold  and  silver  in. . .        95 
magnetite  in 17 
work  in 17, 22-23 
Archean  rocks,  occurrence  of 29, 41-42 
ores  in 34 
Arizona,  copper  in 98-104 
copper  in,  gold  and  silver  in 95, 99 
production  of 93, 98 
smelting  of 95-96 
work  in 17 
Arkansas,  Garland  County,  clays  of 407-410 
Garland  County,  clays  of,  analysis  of.  407-409 
glass  sand  in 462-463, 470 
analysis  of 462-463 
work  in 21 
Arnold,  Ralph,  on  coal  in  Mount   Diablo 
Range,  Cal 223-225 
on  Salt  Lake  oil  field,  Cal 357-361 
work  of 23 
Ashcroft,  Colo.,  iron  ores  near 196-197 
Ashland,  Ky.,  clays  at,  sections  of 413 
Ashley,  G.  H.,  on  Clearfield  coal  field 271-275 
on  clays  and  shales  in  central  Pennsyl- 
vania    442-444 
work  of 204 
Ashley,  G.  H.,  and  Peck,  F.  B.,  on  Punxsu- 
tawney  and  G'en  Campbell  coal 
fields 276-279 
Asphalt,  bibliography  of 373 
investigation  of 23 
occurrence  of 310 
paper  on 369-372 
See  also  Ozokerite;  Utah. 
Attalla,  Ala.,  iron  ores  at  and  near 177-178 
iron  ores  at  and  near,  analyses  of 177-178 
Austria-Hungary,  copper  in,  production  of .        94 
B. 
B  &  B  mine,  Mont.,  description  of 48 
Bachert,  E.  W.,  work  of 160 
Bain,  H.  Foster,  on  Nevada  zinc  deposits.  166-169 
resignation  of 17 
work  of 19, 166 
Baker  River,   Wash.,  limestone  and  clay 
on 379-380 
limestone  and  clay  on,  analyses  of 380 
Balaklala  mine,  Cal.,  copper  ores  of 106 
Bald  Mountain,  Wyo.,  gold  at 307 
Bald  Mountain  ledge,  Idaho,  ores  of 135 
489 
