136         CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,    1907,   PART   II. 
Analysis  of  coal  samples  from  Sheridan  field,  Wyoming — Continued. 
19. 
20. 
21. 
22. 
23. 
24. 
25. 
26. 
Smith. 
Roland. 
/Badger 
\  Creek. 
Ken- 
drick. 
Powder 
River. 
r  3  miles 
I  north  of 
1    Sheri- 
[     dan. 
Sec.  25, 
T.  57  N., 
R.84W. 
Sec.  29, 
T.58.N., 
R.82W. 
Sec.  2,  T. 
8S.,R.43 
E.,  Mon- 
tana. 
Sec.  21, 
T.57N., 
R.76W. 
SW.i 
NW.i 
sec.  7,  T. 
55  N., 
R.83W. 
Sec.  14, 
T.54N., 
R.83W. 
Kendrick 
station, 
sec.  24,  T. 
55  N.,  R. 
78  W. 
5545. 
5380. 
5382. 
5403. 
5402. 
5546. 
5748. 
5922. 
Sample  as  received: 
23.93 
35.75 
34.25 
6.07 
.82 
6.49 
50.98 
1.08 
34.56 
4,902 
8,824 
23.54 
34.46 
37.18 
4.82 
1.44 
23.28 
35.47 
37.34 
3.91 
.26 
28.86 
29.50 
38.36 
3.28 
.32 
6.31 
48.66 
.84 
40.59 
4,573 
8,231 
28.55 
29.43 
38.31 
3.71 
.28 
6.43 
48.52 
.76 
40.30 
4,574 
8,233 
22.35 
31.41 
34.70 
11.54 
2.67 
5.69 
47.94 
1.02 
31.14 
4,572 
8,230 
24.70 
35.17 
30.02 
10.11 
.46 
30.32 
g  I  Volatile  matter 
:~  1  Fixed  carbon 
^IfAsh 
30.79 
31.90 
6.99 
1.25 
6.36 
44.76 
.91 
39.73 
5,005 
9,009 
4,923 
8,861 
4,232 
7,618 
4,278 
British  thermal  units. 
7,700 
Loss  of  moisture  on  air 
8.10 
6.90 
10.00 
12.80 
14.20 
7.00 
15. 00 
15.30 
Air-dried  sample: 
17.23 
38.90 
37.27 
6.60 
.89 
6.09 
55.47 
1.18 
29.77 
5,334 
9,602 
17.87 
37.01 
39.94 
5.18 
1.55 
14.76 
39.41 
41.49 
4.34 
.29 
18.42 
33.83 
43.99 
3.76 
.37 
5.61 
55.80 
.96 
33.50 
5,244 
9,439 
16.72 
34.31 
44.65 
4.32 
.33 
5.65 
56.55 
.89 
32.26 
5,331 
9,596 
16.51 
33.77 
37.31 
12.41 
2.87 
5.28 
51.55 
1.10 
26.79 
4,916 
8,849 
11.41 
41.38 
35.32 
11.89 
.54 
17.74 
g  1  Volatile  matter 
»h  i  Fixed  carbon 
^  KAsh... 
36.35 
37.66 
8.25 
1.48 
5.50 
52.85 
1.07 
30.85 
Calories 
5,376 
9,677 
5,470 
9,846 
4,979 
8,962 
5,051 
British  thermal  units. 
9,091 
DETAILED   DESCRIPTION   OF  COAL  BEDS. 
The  following  brief  descriptions  of  coal  are  given  in  order  of  groups 
from  the  base  of  the  section  upward.  This  order  of  treatment  hap- 
pens to  run  at  the  same  time  from  the  better-known  and  more  exten- 
sively developed  coals  to  those  less  known  and  of  less  value  at  the 
present  time. 
MASTERS    COAL    BEDS. 
The  upper  of  the  two  Masters  coal  beds  has  been  exposed  in  pros- 
pect pits  and  mined  at  various  times  for  local  use  at  several  places 
in  sees.  10  and  14,  T.  57  N.,  R.  85  W.  It  is  reported  that  both  beds 
have  been  penetrated  by  prospect  drills  at  a  number  of  other  places 
in  the  vicinity.  At  the  base  of  a  small  butte  in  sec.  4,  T.  57  N.,  R. 
85  W.,  the  lower  bed  is  exposed  as  follows: 
Section  of  lower  Masters  coal  bed,  in  sec.  4,  T.  57  N.,  R.  85  W. 
Shale,  carbonaceous.  Ft.    in. 
Coal 3 
Shale,  blue 2 
Coal 6     6 
Shale,  gray. 
Total  workable  coal G     6 
