HARMONY,    COLOB,   AND   KANAB   COAL   FIELDS,    UTAH. 
397 
as  could  be  obtained,  but  as  the  working  faces  are  not  far  from  the 
outcrop,  and  as  active  mining  was  not  in  progress  when  the  samples 
were  collected,  they  probably  represent  slightly  weathered  coal, 
Analyses  of  coal  samples  from  the  Colob  field,  southern  Utah. 
Location 
Laboratory  No. 
xw.i  x\v.; 
sec.  36,  sec.  31, 
T.  36  T.  36 
S.,  R.  S.,  R. 
10W.  10W. 
5304 
5494 
10.35 
36.33 
43.70 
9.62 
Sample  as  received: 
.  (Moisture 
g  )  Volatile  matter 
? '  Fixed  carbon 
^  [f Ash 
I  Sulphur 5.82 
.  Hydrogen 5.13 
~  \  Carbon 61. 24 
'-'  Nitrogen 95 
[Oxygen 17. 24 
Calories 6, 041 
British  thermal  units 10, 874 
Loss  of  moisture  on  air  drying 
4.93 
37.24 
44.79 
13.04 
6.72 
5.11 
63.01 
.93 
11. 19 
6,340 
11,412 
NW.i 
sec.  24, 
T.  37 
S.,  R. 
1 1  W . 
5305 
14.19 
33.39 
42.50 
9.92 
5.39 
5.  20 
55.27 
.85 
23.  37 
5,515 
9,927 
NW.| 
sec.  33, 
T.  37 
S.,  R. 
11  W. 
5307 
12.56 
36.43 
46.21 
4.80 
5.24 
5.67 
62.13 
.93 
21.23 
6,079 
10, 942 
ir-dried  sample: 
.  [Moisture 
g  I  Volatile  matter 
<~ )  Fixed  carbon 
^IfAsh 
I  (Sulphur 
Hydrogen 
Carbon 
Nitrogen 
Oxygen 
Calories 
British  thermal  units. 
1.80 
8.71 
37.00 
44.50 
9.80 
5.  93 
5.02 
62.35 
.97 
15.93 
6,152 
11,073 
1.40 
3.58 
37.78 
45.42 
13. 22 
6.82 
5.02 
63.91 
.94 
10.09 
6,430 
11,574 
11.72 
34.35 
43.72 
10.21 
5.55 
5.03 
56.86 
.87 
21.48 
5,674 
10,213 
1.60 
11.11 
37.02 
46.96 
4.88 
5.32 
5.58 
63.14 
.94 
20.14 
6,178 
11,120 
NW.l 
src.  ni, 
T.  41 
S.,  R. 
7  W. 
5314 
16.59 
32.  59 
37.38 
13.44 
3.41 
5.39 
46.66 
.85 
7..SS2 
NW.J 
sec.  24, 
T.  40 
S.,  R. 
7  W. 
5341 
3.90 
13.20 
33.91 
38.90 
13.99 
3.55 
5.16 
48.55 
.88 
27.87 
4,557 
8,202 
20.56 
32.43 
40.79 
6.22 
1.19 
6.08 
57.11 
1.01 
28.39 
5,441 
9,794 
NE.Jsei 
39  S.,  R.  9W. 
a  5306        ?>5308 
4.70 
16.64 
34.03 
42.80 
6.53 
1.25 
5.83 
59.93 
1.06 
25.  40 
5,709 
10,277 
15.74 
41.92 
28.00 
14.34 
1.32 
6.11 
51.96 
1.16 
25.11 
5,282 
'.1.50s 
7.35 
46.93 
22.48 
23.24 
1.61 
6.18 
51.. ss 
1.06 
16.03 
5,753 
10,355 
4.50 
1.10 
11.77 
43.89 
29.32 
15.02 
1.38 
5.87 
54.  41 
L.21 
22.  1 1 
5,531 
9, 956 
6.32 
47.45 
22.73 
23.50 
1.63 
6.13 
52.46 
1.07 
15.21 
5,817 
10,470 
a !  rpper  2  Eee1 . 
'»  Lower  3J  feet. 
The  coal  contains  considerable  moisture,  and  in  general  a  large 
amount  of  ash,  though  in  some  samples  the  ash  is  only  medium;  sul- 
phur, too,  is  high,  especially  for  coals  of  the  Rocky  Mountain  region, 
The  analyses  show  that  in  addition  to  carrying  these  impurities  the 
coals  are  intrinsically  of  medium  low  grade,  the  change  from  the  origi- 
nal vegetable  matter  from  which  the  coal  is  derived  having  progressed 
only  moderately  in  the  process  of  transformation  to  pure  carbon. 
Calculated  on  an  ash-free  and  moisture-free  basis,  the  carbon  in  the 
ultimate  analyses  ranges  from  66  to  76  per  cent.  The  carbon- 
hydrogen  ratios  of  the  air-dried  samples,  ranging  from  12.42 
to  9.40,  and  the  heating  values,  which  range  from  8,202  to 
11,120  British  thermal  units,  also  indicate  that  the  coal  is  of  medium 
to  low  grade.  It  should  be  noted  that  the  samples  from  the  western 
part  of  the  field,  east  of  Cedar  City  and  I\anarraville,  show  better 
results  than  those  from  the  eastern  part,  in  the  vicinity  of  Mount 
Carmel  and  Glendale.  Judged  from  the  analyses,  therefore,  the  coal 
of  the  Colob  field  ranges  from  low-grade  bituminous  to  subbitu- 
minous. 
In  view  of  its  possible  future  use  in  reducing  the  iron  ores  in  the  Iron 
Springs  district,  which  is  only  10  miles  northwest  of  Cedar  City,  the 
