SPECIFIC GRAVITY. 
27 
Impurities in coal as related to different grades of fineness, etc. — Continued. 
NO. 2298, WEST VIRGINIA NO. 15. a 
Mechanical distribution of 
coal. 
Amount of ash in 
each class. 
Amount of sulphur 
in each class. 
Grade and class of coal. 
Per cent 
of entire 
sample 
in each 
grade. 
Amount in each 
class. 
As per 
cent of 
coal in 
the class. 
As per 
cent of 
entire 
sample 
of coal. 
As per 
cent of 
coal in 
the class. 
As per 
cent of 
Per cent 
of its own 
grade. 
Per cent 
of entire 
sample. 
entire 
sample 
of coal. 
1. 
2. 
3. 
4. 
5. 
6. 
7. 
~ .(80 
5.35 
4.35 
55. 15 
44.85 
5.35 
4.35 
10.35 
8.27 
4.39 
13.63 
22.75 
57.78 
4.56 
13.40 
22.89 
53.03 
5.40 
13.10 
24.88 
66.15 
0.554 
.360 
.917 
.041 
.046 
.671 
1.370 
.167 
.137 
.663 
1.597 
.288 
.298 
.860 
3.42 
3.10 
1.62 
6.37 
10.10 
26.95 
1.59 
6.48 
10.25 
26.26 
1.73 
6.40 
7.40 
13.05 
0.183 
Du8t i80to40 
.115 
9.70 100.00 
9.70 
22. 65 
Fine, 40 to 10 
92.68 
1.33 
.89 
5.10 
20. 90 
.30 
.20 
1.15 
Specific gravity— 
Under 1.35 
.338 
1.35 to 1 45 
019 
1.45 to 1.65... 
.020 
Above 1.65 
.310 
100.00 | 22.55 
33.20 
Medium, 10 to 4 
90.65 
3.77 
1.81 
3.77 
30.05 
1.25 
.60 
1.25 
Specific gravity— 
.478 
1 35 to 1 45 
081 
1.45 to 1.65 
.061 
Above 1.65 
.328 
Sum 
100.00 
33. 15 
34.30 
86.30 
6.42 
3.49 
3.79 
29. 60 
2.20 
1.20 
1.30 
Specific gravity— 
Under 1.35 
.512 
1.35 to 1.45 
.141 
1.45 tol.65 
.089 
Above 1.65 
.171 
Sum 
100. 00 
34.30 
Total 
99.85 
99.70 
7.969 
7.34 
2.846 
Original sample 
2.82 
1 
NO. 2278, WYOMING NO. 3.*> 
~, ,f80 
2. 05 
1.70 
54.62 
45.38 
23. 45 
19.43 
5.46 
47.51 
5.54 
47.98 
6.53 
50.03 
0.481 
.330 
.453 
1.378 
1.255 
3. 239 
2.494 
8.330 
8.89 
8.21 
4.91 
14.43 
4.72 
15.54 
4.66 
18.04 
0. 182 
Dust t80to40 
.139 
3.75 
3.75 
11.50 
100.00 
Fine, 40 to 10 
74.12 
25.88 
8.30 
2.90 
Specific gravity— 
Under 1.35- 
.407 
Above 1.35 
.418 
Sum 
100. 00 
11.20 
29. 85 
Medium, 10 to 4 
77.03 
22.97 
22.65 
6.75 
Specific gravity— 
Under 1.35 
1.069 
Above 1.35 
1.049 
Sum 
100.00 
69.65 
30.35 
29. 40 
38.20 
16.65 
Coarse, 4 to 2 
54.85 
Specific gravity — 
Under 1.35 
1.780 
Above 1.35 
3.004 
Sum 
100. 00 
54.85 
99.95 
Total 
99.20 
17.960 
17.96 
8.048 
8.36 
aSp.gr. of average lumps, 1.31; of selected lumps, 1.28. 
<>Sp. gr. of average lumps, 1.40; of selected lumps, 1.28. 
