"xJSxVSS.  >    Production  of  Mercury  in  Spain.  747 
erected  for  the  interior  support  of  the  mines  cost,  for  materials  and 
labor,  including  transportation,  timbers  used  for  bracing  galleries 
and  shafts,  etc.,  a  total  of  $155,477.  Shop  expenses  for  work  not 
let  out  by  contract  amounted  to  $15,931  ;  the  various  articles  classed 
as  accessories  cost  381,658,  and  labor  not  otherwise  specified  added 
$44,498  to  the  expense. 
For  labor  used  in  distillation  during  191 7  the  expenditure  wa> 
$76,132,  and  for  supplies  $82,148.  Ten  pairs  of  Bustamente  sub- 
liming  furnaces,  two  Cormak-Spirek  continuous-movement  furnaces 
for  fine  materials,  and  three  double-pan  furnaces  of  the  same  system 
for  coarse  ores  were  employed.  In  the  Bustamente  furnaces  7.550 
tons  of  mineral  were  treated,  from  which  were  produced  984,486 
pounds  of  mercury.  In  the  Spirek  system  688,795  pounds  of  mer- 
cury were  produced  from  5,616  tons  of  ore. 
Output  and  Quantities  Exported. — The  ore  on  hand  at  the  be- 
ginning of  1918  amounted  to  60.225  short  tons  and  the  production 
during  the  year  was  11. 013,  making  a  total  of  71,238  tons.  Mineral 
treated  during  the  year  totaled  13,166  tons,  yielding  91 1.7  tons  of 
mercury ;  thus  the  metal  content  was  6.93  per  cent. 
The  exports  of  mercury  from  Spain  for  the  years  1908  to  1916, 
inclusive,  were : 
Year. 
Pounds. 
Year. 
Pounds. 
2.353.629 
1913 
2,746.386 
1909  
3,069,959 
IOI4 
2,099,978 
2,466,935 
1915 
2,694.394 
3,293,392 
1916 
1,752,538 
1912  
2,769,085 
A  comparison  of  the  figures  of  output  and  export  shows  that 
practically  the  entire  production  is  exported — chiefly  to  Great 
Britain. 
