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Boutwell,  J.  M.  Ore  deposits  of  Bingham,  Utah.  In  Bulletin  U.  S.  Geol.  Sur- 
vey No.  213,  pp.  105-122.     1903. 
Brooks,  A.  H.  Reconnaissance  from  Pyramid  Harbor  to  Eagle  City,  Alaska. 
In  Twenty-first  Ann.  Kept.  U.  S.  Geol.  Survey,  pt.  2,  pp.  331-391.     1902. 
Reconnaissance  of  a  part  of  the  Ketchikan  mining  district,  Alaska.  Pro- 
fessional Paper  U.  S.  Geol.  Survey  No.  1,  116  pp.     1902. 
Diller,  J.  S.  Copper  deposits  of  the  Redding  region,  California.  In  Bulletin 
U.  S.  Geol.  Survey  No.  213,  pp.  123-132.     1903. 
Douglas,  J.  The  metallurgy  of  copper.  In  Mineral  Resources  U.  S.  1882,  pp. 
257-280.     1883. 
The  cupola  smelting  of  copper  in  Arizona.     In  Mineral  Resources  U.  S. 
1883-84,  pp.  397-410.     1885. 
Gignoux,  J.  E.  The  manufacture  of  bluestone  at  the  Lyon  mill,  Dayton,  Nevada. 
In  Mineral  Resources  U.  S.  1882,  pp.  297-305.     1883. 
Howe,  H.  M.  Copper  smelting.  Bulletin  U.  S.  Geol.  Survey  No.  26,  107  pp. 
1885.     [Out  of  print] 
Irving,  R.  D.  The  copper-bearing  rocks  of  Lake  Superior.  Monograph  V,  U.  S. 
Geol.  Survey,  464  pp.     1883. 
Lindgren,  W.  The  copper  deposits  of  the  "Seven  Devils,"  Idaho.  In  Mining 
and  Scientific  Press,  vol.  78,  p.  125.     1899. 
Copper  deposits  at  Clifton,  Arizona.     In  Bulletin  U.  S.  Geol.  Survey  No. 
213,  pp.  133-140.     1903. 
Mendenhall,  W.  C,  and  Schrader,  F.  C.  Copper  deposits  of  the  Mount  Wrangell 
region,  Alaska.     In  Bulletin  U.  S.  Geol.  Survey  No.  213,  pp.  141-148.     1903. 
Peters,  E.  D.  The  roasting  of  copper  ores  and  furnace  products.  In  Mineral 
Resources  U.  S.  1882,  pp.  280-297.     1883. 
The  mines  and  reduction  works  of  Butte  City,   Montana.      In  Mineral 
Resources  U.  S.  1883-84,  pp.  374-396.     1885. 
Ransom,  F.  L.  Copper  deposits  of  Bisbee,  Arizona.  In  Bulletin  U.  S.  Geol.  Sur- 
vey No.  213,  pp.  149-157.     1903. 
The  Globe  copper  district,  Arizona.     Professional  Paper  U.  S.  Geol.  Sur- 
vey No.  12.     1904. 
Rohn,  O.  Reconnaissance  of  the  Chitina  River  and  the  Skolai  Mountains,  Alaska. 
In  Twenty-first  Ann.  Rept.  U.  S.  Geol.  Survey,  pt.  2,  pp.  398-440.     1901. 
Schrader,  F.  C.  Reconnaissance  of  a  part  of  Prince  William  Sound  and  the 
Copper  River  district,  Alaska,  in  1898.  In  Twentieth  Ann.  Rept.  U.  S.  Geol. 
Survey,  pt.  7,  pp.  341-423.     1900. 
Schrader,  F.  C,  and  Spencer,  A.  C.  The  geology  and  mineral  resources  of  a 
portion  of  the  Copper  River  district,  Alaska,  U.  S.  Geol.  Survey.     1900. 
Spencer,  A.  C.  Mineral  resources  of  the  Encampment  copper  region,  Wyoming. 
In  Bulletin  U.  S.  Geol.  Survey  No.  213,  pp.  158-162.     1903. 
Reconnaissance  examination  of  the  copper  deposits  at  Pearl,  Colorado. 
In  Bulletin  U.  S.  Geol.  Survey  No.  213,  pp.  163-169.     1903. 
Vaughan,  T.  W.     The  copper  mines  of  Santa  Clara  Province,  Cuba.     In  Eng.  and 
Min.  Jour.,  vol.  72,  pp.  814-816.     1901. 
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