CONTENTS. 
Page. 
Introduction,  by  C.  W.  Hayes 7 
Investigations  of  metalliferous  ores,  by  S.  F.  Emmons 14 
INVESTIGATIONS  OF  IRON  ORES,  STRUCTURAL  MATERIALS,    ETC.,   by  E.  C.  Eckel.  20 
told  and  silver 26 
Colorado: 
Lake  Fork  extension  of  the  Silverton  mining  area,  by  L.  H.  Woolsey. .         26 
Montana: 
The  Granite-Bimetallic  and  Cable  mines,  Philipsburg  quadrangle,  by 
W.  H.  Emmons 31 
Washington: 
Gold-bearing  river  sands  of  northeastern  Washington,  by  A.  J.  Collier.         56 
Wyoming: 
Gold  developments  in  central  Uinta  County  and  at  other  points  on 
Snake  River,  by  A.  R.  Schultz 71 
Survey  publications  on  gold  and  silver 89 
Copper 93 
Wyoming: 
Copper  deposits  of  the  Hartville  uplift,  by  S.  H.  Ball 93 
Survey  publications  on  copper 108 
Nickel,  uranium,  etc 110 
Colorado: 
Carnotite  in  Rio  Blanco  County,  by  H.  S.  Gale 110 
Maine: 
Note  on  a  mineral  prospect  near  Ayers  Junction,  West  Pembroke,  by 
G.  0.  Smith 118 
Oregon : 
Nickel  deposits  of  Nickel  Mountain,  by  G.  F.  Kay 120 
Survey  publications  on  tin,  quicksilver,  platinum,  nickel,  etc 128 
Lead  and  zinc... 129 
Survey  publications  on  lead  and  zinc 129 
Iron  and  manganese  ores 130 
Alabama: 
The  Clinton  or  red  ores  of  the  Birmingham  district,  by  E.  F.  Burchard.       130 
The  brown  iron  ores  of  the  Russellville  district,  by  E.  F.  Burchard. . .       152 
The  gray  iron  ores  of  Talladega  County,  by  P.  S.  Smith 161 
Pennsylvania: 
Magnetite  deposits  of  the  Cornwall  type  in  Berks  and  Lebanon  counties, 
by  A.  C.  Spencer 185 
Wyoming: 
The  Hartville  iron-ore  range,  by  S.  H.  Ball 190 
Titaniferous  iron  ore  of  Iron  Mountain,  by  S.  H.  Ball 206 
Survey  publications  on  iron  and  manganese  ores 213 
3 
