14 
EXPERIMENTAL WORK IN FUEL TESTING. 
Changes in moisture content of sample {No. 1638 C) of undried Illinois coal — Continued. 
SECOND SERIES— 10 GRAMS ON 4-INCH WATCH GLASS. 
Air of laboratory. 
Time interval between weighings. 
weight. 
Tempera- 
ture. 
Humid- 
ity. 
Grams. 
-0.0280 
- .0380 
- .0605 
- .1965 
- .2535 
- .2140 
+ .0575 
+ .0130 
- .0518 
- .0622 
- .0725 
Per cent. 
-0.28 
- .38 
- .61 
-1.96 
-2.54 
-2.14 
+ .58 
+ .13 
- .52 
- .62 
- .72 
° C. 
25 
Per cent. 
50 
25 
24 
28 
25 
18 
27 
32 
32 
43 
36 
35 
63 
64 
35 
41 
48 days 
55 
9.06 
THIRD SERIES— 17.2 GRAMS IN OPEN, WIDE-MOUTHED 2-OUNCE BOTTLE. 
10 minutes 
1£ hours 
Si hours 
21 hours 
Stirred and reweighed. 
24 hours 
Stirred with spoon 
26 hours 
Stirred with spoon 
42 hours 
Stirred with spoon 
4 days 
Stirred with spoon 
15 days 
Stirred with spoon 
48 days 
Total loss in 72 days 
-0.0025 
- .0115 
.0260 
- .0800 
- .0020 
- .0855 
- .0020 
.0885 
.0015 
.0625 
.0010 
- .1190 
.0005 
- .3625 
- .0000 
■ .0200 
0.014 
- .067 
.15 
- .47 
- .01 
.50 
.01 
- .51 
- .01 
.36 
.005 
.70 
- .003 
-2.11 
- .000 
- .116 
5. 035 
22 
24 
36 
28 
36 
25 
63 
18 
64 
27 
35 
32 
41 
32 
55 
61 
A second sample (No. 1638 E) of undried Illinois coal contained 11.89 
per cent moisture, and being a duplicate of No. 1038 C, except that it 
was perhaps more finely pulverized, was also tested in a similar way, 
by spreading 1 gram on a 3-inch watch glass and 10 grams on a 3-inch 
watch glass, and by placing 14.5 grams in an open, wide-mouthed 
2-ounce bottle. The changes occurring in these three samples are 
given in the following table: 
Changes in moisture content of sample (No. 1638 E) of undried Illinois coal. 
FIRST SERIES— 1 GRAM ON 3-INCH WATCH GLASS. 
Air of laboratory. 
Time interval between weighings. 
weight. 
Tempera- 
ture. 
Humid- 
ity. 
5 minutes 
Grams. 
-0.0215 
- .0160 
- .0110 
- .0290 
- .0055 
- .0063 
+ .0143 
+ .0060 
- .0142 
+ .0025 
- .0173 
Per cent. 
-2.15 
-1.60 
-1.10 
-2.90 
-0.55 
-0.63 
+1.43 
+ .60 
-1.42 
+ .25 
-1.73 
° a 
25 
Per cent. 
50 
20 minutes 
1£ hours 
25 
24 
28 
25 
18 
27 
32 
32 
43 
20$ hours 
36 
24£ hours 
36 
25 hours 
63 
42 hours 
64 
35 
15 days 
41 
48 days 
55 
Total loss in 72 days 
9.80 
