SPECIFIC GRAVITY. 
23 
DETERMINATIONS OF SPECIFIC GRAVITIES OF THE COALS. 
Two determinations of specific gravity were made on a number of 
lumps about 1 inch in diameter. The first determination was made 
upon a number of specially selected lumps representing as clean coal 
as could be picked out, carefully avoiding portions contaminated with 
slate or pyrites; the second was made upon a number of lumps 
selected to represent the average quality of the coal as nearly as could 
be expected in pieces of this size. The determinations of each kind 
were made (in duplicate and sometimes in triplicate) with a large 
Nicholson's hydrometer designed for use with the coke samples and 
capable of handling 1,000 grams of coal. The following table gives 
the results on the two kinds of lumps. For ease of reference and for 
comparison the determinations of ash and sulphur on the car samples 
of each coal are also tabulated. 
Determinations of ash, sulphur, and specific gravity. 
Designation of coal sampled. 
Alabama No. 2 B. 
Alabama No. 3... 
Alabama No. 4... 
Arkansas No. 7 A 
Brazil 
Illinois No. 19 B 
Illinois No. 23 A 
Illinois No. 25 
Illinois No. 26 
Illinois No. 27 
Indiana No. 5 
Indiana No. 6 
Indiana No. 7 A 
Indiana No. 8 
Indiana No. 9 A 
Indiana No. 9 B 
Indiana No. 10 
Indiana No. 11 
Indiana No. 12 
Kansas No. 6 
Kentucky No. IB 
Kentucky No. 5 
Kentucky No. 6 
Kentucky No. 7 
Maryland No. 1 
Missouri No. 6 
New Mexico No. 3 
New Mexico No. 4 A. . 
New Mexico No. 5 
North Dakota No. 1 B. 
North Dakota No. 3... 
OhioNo.l 
Ohio No. 2 
Ohio No. 3 
OhioNo.4 
Ohio No. 5 
OhioNos. 6 A,6B 
OhioNo.7 
Ohio No. 8 A 
Ohio No. 9 A 
Ohio No. 9 B 
Pennsylvania No. 4 ... 
Pennsylvania No. 5 A. 
Pennsylvania No. 5 B . 
Pennsylvania No. 6 . . . 
Do 
7B 
Pennsylvania No. 7 A, 
Pennsylvania No. 8 . . . 
Pennsylvania No. 9. . . 
aNo distinction made between clean or selected lumps and average lumps. 
Car sample. 
Specific 
gravity. 
Ash. 
Sulphur. 
Selected 
lumps. 
Average 
lumps. 
14.59 
1.12 
1.32 
1.37 
14.36 
.55 
1.30 
1.38 
12. 92 
1.08 
1.28 
1.32 
11.69 
2.02 
1.32 
1.44 
21.93 
2.72 
1.37 
1.40 
^.36 
.91 
1.31 
1.33 
11.53 
4.41 
1.22 
1.26 
13.40 
4.76 
1.26 
1.30 
12. 09 
3.51 
1.22 
1.31 
13.77 
4.05 
1.24 
1.28 
10.88 
4.27 
1.28 
1.42 
12. 62 
4.39 
1.25 
1.39 
9.21 
3.74 
1.27 
1.40 
10.61 
3.72 
1.29 
1.30 
10.30 
3.27 
1.25 
1.36 
10.76 
3.15 
1.25 
1.33 
8.57 
3.83 
1.24 
1.29 
8.14 
1.41 
1.26 
1.30 
11.65 
3.87 
1.26 
1.32 
15.72 
3.72 
1.23 
1.34 
3.37 
.88 
1.27 
1.40 
3.70 
.67 
1.29 
1.30 
2.76 
.57 
1.27 
1.28 
9.48 
3.60 
1.31 
1.44 
13.13 
1.49 
1.36 
1.41 
11.74 
5.60 
1.21 
1.36 
16.67 
.73 
1.29 
1.37 
14.57 
.61 
1.30 
1.39 
14.57 
.69 
1.31 
1.35 
11.42 
3.54 
1.25 
1.44 
7.75 
1.15 
al 
22 
11. 95 
4.61 
1.29 
1.35 
11.33 
4.02 
1.31 
1.36 
11.58 
1.81 
1.30 
1.33 
9.12 
3.47 
1.30 
1.39 
7.30 
1.72 
1.29 
1.33 
8.52 
3.33 
1.29 
1.35 
6.37 
2.16 
1.30 
1.34 
8.37 
2.84 
1.30 
1.42 
8.29 
3.15 
1.29 
1.31 
11.93 
3.35 
1.30 
1.36 
10.41 
1.26 
1.30 
1.35 
6.02 
1.20 
1.30 
1.31 
6.05 
.88 
1.28 
1.33 
13.00 
1.95 
1.30 
1.33 
12.52 
1.94 
1.30 
1.38 
12.47 
2.08 
1.33 
1.41 
6.63 
.94 
1.31 
1.36 
11. 33 
2.04 
1.35 
1.39 
