campbell]  THE    DEER    CREEK    COAL    FIELD,    ARIZONA.  255 
The  coal  beds  of  the  Lower  field  were  carefully  sampled  by  the 
writer,  but  the  results  do  not  show  so  good  a  coal  as  that  shown  by 
the  analyses  just  given.  Whether  this  difference  is  due  to  the  mode  of 
sampling  or  whether  it  is  on  account  of  the  better  quality  of  the  coals 
in  the  Upper  field  can  not  now  be  decided.  In  order  to  test  the  coal 
of  the  Lower  field,  a  cut  was  made  in  the  Reed  shaft  across  the  bench 
of  hard  coal,  15  inches  thick  (No.  1  in  the  section  on  page  251),  which, 
according  to  Mr.  Eugene  C.  Sullivan,  of  the  United  States  Geological 
Survey,  shows  the  following  composition: 
Analgsis  of  hard  coal  from  Reed  shaft,  Lower  field. 
Per  cent. 
Moisture 1.  22 
Volatile  combustible  matter 28.  80 
Ash,  almost  white 43.  74 
Fixed  carbon 26.  24 
Sulphur 1.  69 
Silica  in  ash 48.  3 
Coke Dull,  not  swollen,  coherent. 
In  this  field  the  softer  parts  of  the  bed  seem  to  have  value,  conse- 
quently a  sample  was  obtained  from  the  lower  bench,  20  inches  in  thick- 
ness, including  Nos.  2  and  3  in  the  section  given  on  page  251.  According 
to  the  same  authority  the  analysis  of  this  crushed  portion  is  as  follows: 
Analysis  of  bottom  part  of  crushed  coal  from  Reed  shaft,  Lower  field. 
Per  cent. 
Moisture 2.  98 
Volatile  combustible  matter 23.  07 
Ash,  slightly  pink 53. 01 
Fixed  carbon 20.  94 
Sulphur 1.  26 
•     Silica  in  ash 61.  6 
Coke Dull,  not  swollen,  friable. 
Of  the  crushed  portion  of  the  bed  the  upper  part,  having  a  thick- 
ness of  about  14  inches,  seemed  to  be  of  better  quality  than  the  lower, 
and  a  sample,  according  to  the  same  authority,  shows  the  following 
composition: 
Analysis  of  upper  part  of  crushed  coal  from  Reed  shaft,  Lower  field. 
Per  cent. 
Moisture 2.  60 
Volatile  combustible  matter 23.  41 
Ash,  white 54.  43 
Fixed  carbon 19.  56 
Sulphur 1. 98 
Silica  in  ash , 53. 4 
Noncoking. 
