258  CONTKIBUTIONS    TO    ECONOMIC    GEOLOGY,   1903.  [bull. 225. 
centage  of  the  -Tuei  value  of  the  coal  would  be  utilized;  therefore  it 
seems  probable  that  the  former  method  would  be  the  most  economical 
menus  of  using  this  deposit.  By  the  modern  methods  of  making  pro- 
ducer or  water  gas  the  whole  of  the  fuel  value  of  this  coal  might  bej 
utilized. 
The  facts  so  far  presented  are  those  which  concern  the  geologic 
occurrence  of  the  coal,  and  these  alone  are  of  interest  in  the  present 
connection.  The  development  of  the  held  and  the  best  mode  of  utiliz- 
ing the  fuel  is  a  question  which  concerns  the  engineer  and  should  bel 
approached  only  by  one  who  is  thoroughly  familiar,  not  only  with] 
local  conditions,  but  also  with  the  best  method  of  handling  fuels  of | 
this  character. 
