IKDEX. 
443 
Page. 
Sentinel   Butte  field,   N.   Dak.-Mont.,  sec- 
tions in 18-21 
structure  of 22 
topography  of 16-18 
paper  on 16-35 
water  of 16 
well  in 22 
Sentinel  Butte  lignite  group,  character  and 
disl ribution  of 30-33 
sections  of 31,33 
ShaliT,  M.  K.,  on  Gallup  district 366 
on  Mancos  coals 373, 375 
work  of 335-336, 352 
Shaw,  E.  W.,  on  Glenroek  coal  field 151-164 
work  of 9 
Sheridan  field,  access  to 125 
coal  of 127, 132-148 
analyses  of 134-136 
character  of 133-136 
grouping  of 132 
markets  for 150 
uses  of 149-150 
development  of 124-132, 148-149 
geology  of 126 
location  of 124 
map  showing 124 
map  of 124 
explanation  of 123 
mining  in 148-149 
paper  on 123-150 
surveys  in 123 
structure  of 132 
timber  in 126 
topography  of 125-126 
water  of 124, 1 26 
Shoshone  River,  coal  section  on 181 
Signal  Butte,  Mont.,  section  near 55 
Silvertip  field,  Wyo.,  coal  Of 183-187 
coal  of,  sections  of 184-186 
Silvertip  mine,  coal  sections  at 184, 186 
Singewald,  J.  T.,  jr.,  work  of 243, 256 
Sirich,  G.  II.,  work  of 152 
Sixteenmile  Creek,  coal  on 87-89 
coal  on,  analysis  of 89 
section  of 88 
Smith,  ('.  D.,  work  of 7-8 
Smith,  C.  D.,  and  Collier,  A.  J.,  on  Miles  City 
coal  field 36-61 
Smith,  ('.  D.,  and  Leonard,  A.  <;..<>n  Sentinel 
Butte  lignite  field 15-35 
Smith,    E.   E.,  on  Great  Divide  basin  coal 
field 220-242 
work  of 9 
Smith  coal,  analysis  of .■ 136 
character  and  distribution  of 130, 141 
section  of 141 
Smokeless  and  Sootless  Coal  Co.,  mine  of 102 
Somerset  district,  Colo.,  coal  of 329-332 
coal  of,  analyses  of 333-334 
sections  of 330-331 
Speyer  mine,  description  of 240-241 
Split  Rock  mine,  description  of 240-241 
Stanton,  T.  W.}  work  of 284 
Stebbinger,  E.,  work  of 108 
Stein  mine,  description  of 216 
Page. 
Stone.  R.  W.,  on  Coal  near  Crazy  Mountains.  78-91 
work  of 8 
Sloops,  C.  W.,  work  of 284 
Strait  coal,  character  and  distribution  of 72 
section  of 72 
Subbituminous coal,  definition  of 12 
Summit  coal,  character  and  distribution  of. . .  72,  73 
Sunday  Creek,  Mont.,  section  on 50 
Superior,  Wyo.,  development  at 277-279 
T. 
Tali'.  J.  A.,  on  Sheridan  coal  field 123-150 
work  of 5  6, 9 
Tertiary  rocks,  coal  in 233-234, 239, 286, 313 
coal  in,  analyses  of 238 
Thompson,  A.  W.,  work  of 124 
|  Tongue  River  coal  group,  character  and  dis- 
tribution of 129-130.  133,  136-142 
U. 
Ulm  coal  group,  character  and  distribution 
of 130-131, 133, 146-148 
sections  of 1 47-148 
J   Umpleby,  J.  B.,  work  of 108 
I  Utah,  coal  of.  See  Vernal  field;  Henrys  Fork 
field;  Harmony  field;  Colob  field; 
Kanab  field;  Utah  (southern)  field; 
Utah  (northeastern)  fields. 
geologic  work  in 10-11 
i   Utah  (northeastern)  fields,  access  to 283 
coal  of 306-315 
analyses  of 314-315 
geology  of 285-293 
location  of,  map  showing 293 
paper  on 283-315 
structure  in 291-292 
Utah  (southern)  field,  access  to 379 
coal  of 383-400 
analyses  of 388, 397 
sections  of 385, 389-396, 399 
geology  of 381-383 
location  of 379-380 
map  of 380 
section  in 381 
structure  of 383 
topography  of 380 
Utica,  Mont.,  section  at 114 
V. 
Van  Dyke  mine,  description  of 275-276 
Veatch,  A.  C,  work  of 7 
Vernal  field,  Utah,  access  to 283 
coal  of 289, 306  309 
analyses  of 314-315 
location  of 306 
map  of ;("' 
comment  on 306 
Virginia,  coal  in.    Set  Pocket  district. 
geologic  work  in 11 
w. 
Warm  Spring  Creek,  Mont.,  coal  on n'> 
Warm  Spring  Creek  district,  Mont.,  coal  of. .  116-116 
coal  of,  analyses  of 120 
