382  CONTKIBUTIONS    TO    ECONOMIC    GEOLOGY,   1903.  [bull.  225. 
reaching  bottom.  This  deposit  alone  contains  enough  of  the  residue 
to  supply  ull  local  needs  for  fuel  for  some  time  to  come.  Another 
deposit  has,  however,  been  discovered  in  the  vicinity  which  has  an  area 
of  3  acres  and  a  thickness  of  at  least  10  feet.  Many  more,  also,  will 
doubtless  be  brought  to  light. 
( Jhemical  and  calorimetric  tests  of  the  petroleum  residue  have  been 
made  ]>\  1  Vnniman  &  Browne,  of  Baltimore.  The  result  of  their  tests 
follows: 
Test  of  petroleum  residue  from  Cold  Bay. 
Moisture: 
\'<  ihitile  matter „ 85.  40 
Fixed  carbon 7.  76 
Ash 6.84 
Sulphur -. . .  0.  36 
Soluble  in  gasoline 68.  20 
Calories 8, 193 
The  table  shows  a  material  that  compares  favorably  with  most  of 
the  coals  sold  on  the  Pacific  coast.  It  is,  indeed,  their  superior  as 
regards  calorific  power,  ash,  and  amount  of  sulphur.  The  amount 
indicated  in  the  table  as  soluble  in  gasoline  represents  the  petroleum 
residue  present,  the  remaining  31.8  per  cent  consisting  of  peat  and 
earthy  material. 
