212 
CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,  1904.         [bull.  260. 
The  increase  in  the  production  of  copper  during  1904  is  mainly 
due  to  Arizona  mines,  but  the  tremendous  development  carried  on  in 
Utah,  notably  at  Bingham,  and  in  the  Frisco  district,  indicates  that 
this  State  will  soon  take  a  more  prominent  place  as  a  copper  pro- 
ducer. When  carefully  studied,  the  figures  show  that  the  Lake 
Superior  district  can  hardly  maintain  its  relative  part  of  the  average 
increase  in  the  production  and  consumption  of  copper ;  that  the  same 
is  true  of  the  Montana  mines,  and  that  the  Arizona  mines  will  show 
a  still  greater  increase,  and  are  likely  in  the  near  future  to  take  the 
lead  in  the  world's  production.  At  the  present  time  the  Boston  and 
Montana  mines  of  Butte  are  the  greatest  producers  in  the  world,  fol- 
lowed by  the  Anaconda,  Lake  Superior,  and  Rio  Tinto  mines,  in  the 
order  named. 
Some  doubt  having  been  expressed  as  to  whether  the  copper  pro- 
duction  of   the   world   can   keep   pace   with   the   consumption    and 
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5 
6 
8 
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9 
10 
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Fig.  1^. — Production  and  consumption  of  copper,  in  tons,  in  the  various  coun- 
tries of  the  world.  1,  Holland  and  Belgium  ;  2,  Asia  ;  3,  England  ;  4,  Austria- 
Hungary  ;  5,  Italy  ;  6,  Africa  ;  7,  France  ;  8,  Russia  ;  9,  Scandinavia  ;  10,  Can- 
ada ;  11,  Australia;  12,  Germany;  13,  Japan;  14,  South  America;  15,  Mexico; 
16,  United  States. 
whether  there  will  be  a  scarcity  of  copper  in  the  future,  with  a  period 
of  high  prices  as  a  result  of  the  rapid  increase  in  the  consumption 
of  copper,  not  only  for  the  electrical  trades,  but  in  the  general  manu- 
facture of  machinery,  which  consumes  even  more  than  that  used  in 
the  manufacture  of  electrical  apparatus,  the  above  diagram  is  pre-* 
sented  to  show  graphically  the  production  of  the  different  districts 
iiiid  of  the  world. 
Our  exports  for  1904  amounted  to  231,354:  long  tons,  all  but  1,430 
tons  going  to  Europe. 
The  copper  deposits  of  the  United  States  are  remarkable  not  only 
for  their  size  and  productiveness,  but  also  for  the  variety  of  the  ores., 
The  great  copper  deposits  of  other  countries  consist  of  chalcopyrite 
(copper  pyrite),  while  in  the  United  States  ores  of  this  charactej 
form  a  relatively  small  part  of  the  total  output.     In  a  general  way 
