ALTERATION OF WEIGHT OF SAMPLES. 
21 
Alteration of weight of finely powdered coal — Continued. 
[Minus sign denotes loss.] 
Sample of coal. 
Days be- 
tween 
weighings. 
Change in 
weight. 
Labora- 
tory 
num- 
ber. 
Field number. 
Moisture 
determina- 
tion. 
2062 
Ohio No. 5 
Per cent. 
Per cent. 
1 99 
9 
18 
149 
108 
.22 
.22 
.40 
.13 
2.49 
2.43 
284 
.97 
.44 
2131 
4.65 
North Dakota No. 3 
2 
3 
24 
7 
43 
28 
55 
107 
.04 
.06 
.18 
.10 
.09 
.00 
.06 
.02 
. 
4.55 
4.46 
269 
.55 
-.19 
2243 
26 64 
4 
3 
7 
43 
28 
55 
107 
.05 
.03 
.08 
.23 
.07 
.16 
-.05 
25.91 
25.64 
247 
.57 
-1.00 
2275 
6.37 
2 
7 
43 
28 
55 
.05 
.05 
.13 
.02 
.06 
6.15 
135 
.31 
-.22 
2278 
12.59 
North Dakota No. 3 
2 
7 
43 
28 
55 
107 
.09 
.22 
.68 
.15 
.38 
.26 
11.97 
11.81 
242 
1.78 
-.78 
2255 
12. 62 
2 
5 
43 
28 
56 
.02 
.17 
.34 
.15 
.16 
12. 86 
134 
.84 
.24 
2718 
33.00 
6 
42 
.29 
.24 
32.87 
51 
.56 
-.13 
2828 
13.60 
8 
13 
3 
103 
.07 
.09 
.00 
-.72 
13.72 
13.16 
127 
-.56 
-.44 
