30 
EXPERIMENTAL WORK IN FUEL TESTING. 
ever, indicate that under the best conditions of washing there would 
be some improvement, but not much, over the results obtained at the 
washery of the fuel-testing plant. 
Determinations of ash and sulphur in coal samples variously treated. 
ILLINOIS NO. 9 A. 
[Unwashed coal— ash. 11.21; sulphur, 4.53.] 
Portion. 
Ash. 
Sulphur. 
Compared with 
original sample. 
Ash. 
Sulphur. 
First series: 
91.9 
75.2 
12.1 
4.2 
6.08 
21.04 
58.34 
3.16 
4.80 
16.93 
4.57 
2.55 
2.45 
2.38 
1.35 to 1.65 
.58 
.71 
9.0 
2.3 
5.6 
91.9 
84.9 
7. 7 
.26 
.78 
.10 
Remainder 
13.88 
4.20 
.24 
Second series: 
10.61 
4.01 
8.22 
44. 02 
3.32 
14.12 
6.98 
3.39 
2.82 
Heavier than 1.45 
1.09 
7.7 
2.4 
5.6 
.27 
.78 
.11 
13.88 
8.14 
8.26 
4.20 
3.63 
3.71 
.24 
Washed at 1^-inch size: 
Sample No. 1 
11.42 | 4.26 
No. 2 
ILLINOIS NO. 11 B. 
[Unwashed coal— ash, 12.54; sulphur, 2.86.] 
80.1 
56.5 
16.1 
5.7 
5.71 
17.49 
58.42 
1.72 
2.48 
11.91 
3.22 
2.82 
3.33 
0.97 
1.35 to 1.65 
.40 
Heavier than 1.65 
.68 
19.5 
5.8 
13.7 
.73 
2.39 
.17 
17. 42 
3.15 
.43 
12. 49 
2.65 
ILLINOIS NO. 19 B. 
[Unwashed coal (boiler-test sample, No. 2044) — ash, 10.57; sulphur, 0.49. 
92.8 
80.9 
5.6 
6.5 
Lighter than 1.35 
4.79 
27.03 
65.75 
0.63 
.52 
.29 
3.88 
1.51 
4.28 
0.51 
1.35 to 1.65 
03 
Heavier than 1.65 
.02 
^o inch and finer . . 
6.9 
3.5 
3.4 
Very fine, decanted a 
.37 
.55 
.02 
Remainder 
16.05 
.60 
.02 
10.59 
.60 
a Estimated from results on unwashed coal. 
