810  CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,   1903.  [bull. -25. 
The  above  analysis  indicates  a  ratio  of  volatile  hydrocarbons  to  fixed 
carbon  of  0.60:20.15,  or  1:3  +,  and  a  calculated  coke  value  of  77  per 
cent.  Theoretically,  the  charge  required  to  produce  1  ton  of  coke 
would  be  1.23  tons  of  coal.  On  comparing  the  composition  of  this 
coal  with  that  of  some  of  the  standard  coking  coals,  it  is  found  that  it 
contains  10  per  cent  more  fixed  carbon  and  8  per  cent  less  volatile 
hydrocarbons  than  Connellsville  coal.  It  very  nearly  equals  Broad 
Top  and  Pocahontas  coals  in  fixed  carbon,  but  contains  a  larger  per- 
centage of  volatile  hydrocarbons.  In  composition  it  probably  is  more 
like  Broad  Top  coal  than  any  of  the  other  standard  coking  coals. 
The  largest  mines  on  this  bed  belong  to  the  Sterling  Coal  Company, 
and,  with  the  exception  of  one,  are  all  in  the  immediate  vicinity  of 
Bakerton.  No.  1,  on  the  west  side  of  the  ravine,  is  one  of  the  largest 
of  the  mines.  It  is  ventilated  by  fan,  has  electric  haulage,  and  the 
coal  is  mined  by  machines.  Nos.  3  and  5,  on  Leslie  Run,  are  very 
similar  in  plan  and  equipment,  the  coal  being  cut  by  machine  and 
hauled  by  electric  motor  to  the  same  tipple.  Ventilation  is  by  fan. 
The  largest  output  of  "B"  coal  in  the  field  is  being  obtained  at  these 
mines.  Mine  No.  6  is  located  at  Elmora,  where  electric  haulage  and 
machines  have  recently  been  installed.  This  mine  is  ventilated  by  fan. 
There  is  another  small  mine  with  mule  haulage  and  furnace  ventilation 
at  Bakerton,  known  as  Nant-Y-Glo  No.  2,  of  the  Nant-Y-Glo  Coal 
Company.  The  onty  other  mines  on  this  bed  are  Logan  No.  5,  of  the 
Logan  Coal  Company,  located  near  Carrolltown  Road,  and  the  Penn- 
sylvania Coal  and  Coke  Company's  slope  mine  at  Mitchell's  mines, 
near  Hastings.  Logan  No.  5  was  opened  in  the  summer  of  1903. 
The  work  is  all  done  without  power,  ventilation  being  necessarily  sup- 
plied by  a  furnace.  In  the  slope  mine  at  Mitchell's  mines  the  coal  is 
very  irregular  in  thickness,  varying  from  12  to  30  inches,  and  there  are 
a  number  of  "roof  rolls."  The  mine  is  ventilated  by  fan,  and  the 
cars  are  hauled  up  the  slope  to  the  tipple  by  steam.  Mules  are  used 
for  inside  hauling,  and  the  coal  is  mined  by  hand.  As  already  stated, 
this  coal  is  mixed  with  Lower  Freeport  coal  and  coked  at  the  mine. 
Just  east  of  Spangler,  Peale,  Peacock,  and  Kerr  began  a  slope  to  reach 
the  "  B"  bed  during  the  latter  part  of  the  past  summer,  and  intend  to 
develop  this  coal  very  extensively,  the  coal  showing  a  thickness  of  3 
feet  4  inches  in  this  part  of  the  field.  This  is  the  only  mine  of  the 
UB"  coal  in  the  Barnesboro  district  and  marks  the  western  limit  of 
its  development. 
