CONTENTS. 
Page. 
jETTER  OF  TRANSMITTAL 9 
INTRODUCTION,  BY   C.  W.  HAYES 11 
NVESTIGATION   OF  METALLIFEROUS   ORES,  BY   S.  F.  EMMONS 19 
INVESTIGATION     OF     IRON     AND     NONMETALLIFEROUS    ECONOMIC    MINERALS, 
by  C.  W.  Hayes 28 
k>LD   AND  SILVER 32 
General  United  States: 
The  production  of  gold  in  the  United  States  in  1904,  by  Waldemar 
Lindgren 32 
The  production  of  silver  in  the  United  States  in  1904.  by  Waldemar 
Lindgren 39 
California: 
Mineral  resources  of  the  Indian  Valley  region,  by  J.  S.  Diller 45 
Colorado: 
Ore  deposits  of  the  Ouray  district,  by  J.  D.  Irving 50 
Ore  deposits  in  the  vicinity  of  Lake  City,  by  J.  D.  Irving 78 
The  geological  resur vey  of  the  Cripple  Creek  district .  by  Waldemar 
Lindgren  and  F.  L.  Bansome - . 85 
Preliminary  report  on  the  ore  deposits  of  the  Georgetown  mining 
district,  by  J.  E.  Spurr  and  G.  H.  Garrey 99 
The  Neglected  mine  and  near-by  properties,  Durango  quadrangle, 
by  W.  H.  Emmons. '  121 
Maryland: 
Notes  on  the  gold  veins  near  Great  Falls,  by  W.  H.  Weed . .       128 
Nevada: 
The  ores  of  Goldfield,  by  J.  E.  Spurr 132 
Developments  at  Tonopah  during  1904,  by  J.  E.  Spurr 140 
Utah: 
Progress  report  on  Park  City  mining  district,  by  J.  M.  Boutwell. .         150 
Washington : 
Gold  placers  of  the  coast  of  Washington,  by  Ralph  Arnold  .  154 
Geological  Survey  publications  on  gold  and  silver 1 58 
N 161 
General: 
The  occurrence  and  distribution  of  tin,  by  F.  L.  Hess  and  L.  C. 
Graton 161 
North  Carolina  and  South  Carolina: 
The  Carolina  tin  belt,  by  L.  C.  Graton 188 
Geological  Survey  publications  on  quicksilver,  tin,  tungsten,  chromium, 
and  nickel .  - -  -  -       196 
OLYBDENUM 197 
Maine: 
A  molydenite  deposit  in  eastern  Maine,  by  G.  O.  Smith 197 
3 
