INDEX. 
(515 
Page. 
New  River  coals,  occurrence  and  character 
of  424-426 
New  South  Wales,  tin  in,  occurrence  of 170 
tin  in,  publications  on 183 
New  Tazewell,  Tenn.,  zinc  near 269 
New  York,  iron  ores  in 339-341 
natural  cement  in,  production  of 503 
Portland  cement  in,  production  of 498 
Portland  cement  resources  of 522-530 
natural  gas  in  Watkins  Glen  district.  570-571 
pyrite  deposits  in 587-588 
salt  of  Watkins  Glen  district 567-570 
tin  in ' 163 
zinc  in 265 
New  Zealand,  tin  in,  occurrence  of 173 
tin  in,  publications  on 186 
Newberry,  J.  S.,  on  copper  ores 225, 228 
Newmarket,  Tenn.,  zinc  near 269 
Newmarket,  Va.,  cement-making  materials 
near 542 
Newsboy  mine,   Colo.,   ores  in,   character 
of 55-56, 71-73 
Nicholas  quadrangle,  W.  Va.,  coal  in 422-428 
Nicholson,  F.  L.,  on  Ste.  Genevieve  copper 
mines 234 
Nickel,  occurrence  of 259 
publications  on,  list  of 196 
Nickel  Plate  coal,  occurrence  and  thick- 
ness of 372 
Nigeria,  tin  in 179 
Nonmetalliferous  minerals,  iron  and  inves- 
tigations of 28-31 
Norris  basin,  Yellowstone  Park,  ore  deposi- 
tion at 600 
North  Carolina,  gold  production  of 33 
silver  production  of 33 
tin  in 16S 
tin  belt  in,  map  of 189 
paper  on 188-195 
work  in 24 
North  Dakota,  cement,  natural,  in,  produc- 
tion of 503 
Nova  Scotia,  copper  in 222 
O. 
Oak  Creek,  Colo.,  rocks  on 52 
Obsidian-like   prophyry,   Colorado,  occur- 
rence of 105 
Ocher  Springs,  Yellowstone  Park,  ore  depo- 
sition at 600 
Ohio,  cement,  natural,  in,  production  of...  503 
cement,  Portland,  in,  production  of 498 
Ohio  Copper  Co.,  developments  by 240 
Oil  and  gas  fields,  work  in 30 
Oil.    See  Petroleum. 
Old  Jordan  mine,  Utah,  developments  at ..  239 
Onondaga  limestone,  occurrence  and  char- 
acter of 522 
Ore,  deposition  of,  as  affected  by  character 
of  country  rock 116 
Ore  bodies,  form  of 55 
Ore  deposits,  formation  of,  by  hot  springs, 
examples  of 599, 600 
Oregon,  gold  production  of 33 
gold  production  of,  from  quartz  veins. .  35 
Page. 
Oregon,  iron  ore  (so-called)  in 343-347 
lead  production  of 254 
silver  production  of 33 
from  quartzose  ores 40 
work  in 27 
Orehill  iron  mines,  Conn.,  operations  at. .  338-339 
Ores,  baritic  siliceous,  occurrence  and  char- 
acter of 71-73 
Ores,  copper,  gold  in 238 
origin  of 238 
Ores,     magnetite-pyrite,     occurrence    and 
character  of 71-75 
Ores,  silver,  analyses  of 143 
in  Colorado 107 
Osage  limestone,  correlation  of 234 
Oscura,  Sierra,  N.  Mex.,  copper  in 226 
Ottine,  Tex.,  natural  gas  at 462-463 
Ouray,  Colo.,  lead  in,  production  of 256 
Ouray  district,  Colo.,  geology  of 51-54 
ore  deposits  of 54-77 
Ouray  formation,  faulting  in 54 
occurrence  and  character  of 51-52, 72 
Oxidized  copper  ores,  production  of 213-214 
Ozark  Oxide  Co.,  developments  by 270 
Ozark  series.    See  Magnesium  series. 
Ozark  uplift,  Mo.,  copper  in 233 
lead  in,  production  of 258 
Ozette  placers,  Washington,  mining  at 156 
P. 
Pacific  sandstone,  correlation  of 234 
Painterhood  limestone,  character  and  thick- 
ness of 447 
Paradox  Valley,  Colo.,  reconnaissance  in..      227 
Park  City,  Utah,  lead  at,  production  of 255 
Park  City  mining  district,  Utah,  progress 
report  on 150-153 
Parsons    formation,   character  and  thick- 
ness of 448 
Pawnee  limestone,  character   and  thick- 
ness of 448 
Peat,  publications  on,  list  of 434-435 
Pegmatite,  character  of,   in  Carolina   tin 
belt 191-192 
in  Colorado,  character  of 104 
occurrence  of 101-102 
Pembina,  N.  Dak.,  cement,  natural,  at 501 
Pennsylvania,  cement,  natural,  in,  produc- 
tion of 503 
cement,  Portland,  in,  production  of 498 
coal,  Pittsburg,  in  Burgettstown  quad- 
rangle    402-410 
slate  quarries  in 486 
Penobscot  Bay  quadrangle,  granite  indus- 
try of  489-492 
Penrose,  R.  A.  F.,  work  of 85, 89 
Permian  rocks,  copper  in,  origin  of 221 
Peters,  E.  D.,  on  copper  deposits 226 
Petroleum,  analysis  of,  from  Texas 582 
deposits  of,  in  Colorado 436-440 
in  Indian  Territory 441-445 
in  Kansas 446-458 
in  Texas  and  Louisiana 459-467 
surface  indications  of 463-465 
from  Indian  Territory,  cha  meter  of 441 
from  Kansas,  character  of 455-466 
