822  CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,    1903.  [bull.  225. 
Analyses  of  Pittsburg  coal  from  Elders  Ridge  field. 
Locality. 
Avonmore 
Arnold  1 . . 
Arnold  2.. 
Iselin 
Ashbaugh. 
Ewing  — 
Evans  1  . . . 
Evans  2... 
Holsten  . . . 
Fixed 
carbon. 
Per  cent. 
56.432 
55. 17 
56.47 
56.34 
53.  639 
50.230 
50. 850 
53. 788 
56.25 
Volatile 
matter. 
Per  cent. 
35. 040 
32.99 
30.02 
31.48 
37. 555 
36.900 
36. 940 
31.995 
33.41 
Mois- 
ture. 
Per  cent. 
0.720 
.51 
.63 
1.76 
1.110 
.  800 
1.040 
1.460 
1.61 
Ash. 
Per  cent. 
6.810 
10.33 
11.83 
10.42 
6. 260 
9.030 
9.  705 
11.760 
8.73 
Sulphur. 
Per  cent. 
0.988 
.98 
1.02 
1.25 
1.436 
3.040 
1.465 
.997 
1.87 
Fuel 
ratio. 
Percent. 
1.61 
1.67 
1.88 
1.79 
1.43 
1.36 
1.38 
1.68 
1.68 
Coke. 
Per  cent. 
64.23 
66.48 
69.32 
68.01 
61. 335 
62.30 
62.02 
66.  545 
66. 85 
Authority. 
L.  W.  Hicks. 
C.  B.  Dudley. 
Wuth  &  Stafford. 
George  Steiger. 
A.  S.  McCreath. 
Do. 
Do. 
Do. 
E.  C.  Sullivan. 
The  Avonmore  analysis,  furnished  by  Mr.  L.  W.  Hicks,  superin- 
tendent of  the  Avonmore  Coal  and  Coke  Company,  shows  that  the  coal 
in  the  Avonmore  mine  (No.  11)  runs  high  in  fixed  carbon  and  low  in 
ash  in  comparison  with  that  from  other  parts  of  the  field.  Although 
the  fuel  ratio  is  not  high,  the  total  amount  of  combustible  matter  is 
the  highest  of  the  nine  samples-  The  percentages  of  sulphur  and  of 
ash  are  both  very  low,  and  the  amount  of  phosphorus  in  this  sample 
was  .010  per  cent.  Judging  from  the  above  analyses  alone,  it  is  evi- 
dent that  the  coal  in  the  Avonmore  mine  is  the  best  in  the  field  for 
steaming  purposes. 
The  Conemaugh  Coal  Company  has  furnished,  through  Mr.  F.  M. 
Graff,  superintendent,  two  analyses  of  the  coal  in  the  Arnold  mine 
(No.  16),  one  made  by  C.  B.  Dudley,  of  Altoona,  the  other  by  Wuth 
&  Stafford,  of  Pittsburg,  Pa.  Both  analyses  run  high  in  ash  and  low 
in  moisture.  Arnold  2  runs  higher  in  fuel  ratio  than  any  other  sample 
from  this  field.  This  is  due  to  a  low  percentage  of  volatile  matter. 
It  also  shows  the  highest  per  cent  of  coke.  The  high  ash,  however, 
keeps  this  from  being  the  best  sample  in  the  above  list.  Arnold  2 
shows  a  phosphorus  content  of  .028  per  cent. 
The  Arnold  mine  has  about  8  acres  of  coal,  and  lies  within  a  few 
hundred  feet  of  the  main  entries  of  the  Conemaugh  mine.  The  Cone- 
maugh Coal  Company  owns  the  coal  all  around  it,  and  these  Arnold 
analyses  probably  represent  the  character  of  the  immediately  surround- 
ing coal. 
The  Iselin  analysis  was  made  from  a  sample  collected  b}^  the  writer 
in  No.  2  heading  of  the  Pittsburg  Gas  Coal  Company  mine  (No.  9)  at 
Iselin.  It  shows  the  composition  of  the  coal  of  the  main  bench,  6i 
feet  thick,  which  is  now  being  taken  out.  The  percentage  of  ash  and 
moisture  is  high,  but  the  fuel  ratio  is  excellent.  The  coke  per  cent 
and  total  amount  of  combustible  matter  are  high.  Nine  tons  of  this 
coal  sent  to  Adrian  to  be  tested  made  a  good  coke. 
