COPPER. 
The  papers  here  presented  represent  the  results  of  the  last  year's 
field  work  by  the  Survey  in  various  copper-mining-  districts.  Other 
districts  producing  copper,  but  to  a  less  value  than  the  precious  metals, 
will  be  found  discussed  under  "Gold  and  silver,"  pages  28  to  153. 
Practically  all  the  important  copper  districts  of  the  United  States 
were  discussed  last  vear  in  Bulletin  No.  213. 
MINING  AND  MINERAL  RESOURCES  IN  THE  REDDING  QUAD- 
RANGLE, CALIFORNIA,  IN  1903. 
By  J.  S.  Diller. 
RANK  OF  SHASTA  COUNTY  AND   PRODUCTION   IN    1902. 
Shasta  is  the  banner  county  of  California  in  productive  mineral 
wealth,  and  the  chief  sources  lie  within  or  very  near  the  Redding  quad- 
rangle. 
The  total  value  of  these  products  and  the  relative  values  of  the 
various  parts  are  stated  in  the  following  table,  which  gives  the  output 
for  1902.  The  returns  for  1903  are  not  yet  available,  but  from  field 
observations  it  is  evident  that  the  output  will  exceed  that  of  the  pre- 
vious year,  especially  in  gold,  silver,  and  copper.  Although  one  of  the 
smelters  was  closed  temporarily  in  the  early  part  of  the  year,  the  total 
product  was  less  affected  than  by  the  strike  of  the  previous  year. 
Mineral  productions  of  Redding  quadrangle  for  1902. 
Quantity. 
Value. 
Gold: 
Placer  
ounces.. 
]                              f 
$605. 15 
Quartz  veins 
....do.... 
13,671.34 
29,  789. 00 
Associated  with  copper 
do.... 
J                         I 
252,  214. 10 
Total                              
282,611.25 
a  306,  887.  00 
Silver,  with  copper 
ounces.. 
588,  357 
Copper  
pounds  fine.. 
21,515,887 
2,  496,  731.  90 
a  Commercial  value,  average  for  1902. 
169 
