Indian Coal. 
283 
1831 .] 
impurity; the Silhet would be still worse: the anthracite of Baghelpur would 
be nearly half earth : — some of the mountain coal from Ava would yield a coke of 
b e tter quality, but of very little density. The Chinese glance coal alone forms a 
remarkable exception to this unfavorable conclusion against oriental coal, and 
deserves to rank at the head of the list in respect to its purity as a coke, although 
in specific gravity it does not come up to the character ot the English fuel, neither 
lias it the spongy texture which must contribute much to the glowing combustion 
of the latter. It will be remarked, that the ashy residue on the analysis oi English 
coke (No. 2) much exceeded what should have been expected from the composi- 
tion of the coal whence it was formed; this may be explained by supposing either 
that portions of the ash, probably tlie alkaline salts, are volatilized along with the 
gaseous matter when suddenly decomposed at a high temperature ; or that con 
siderable variation exists in the quality of the material charged in tin coke oven . 
whatever may be the cause, the same deterioration might be looked ioi in the cok 
ing of Indian coal, which would tend to lower them still more in the scale ot com- 
parison. 
Table of Indian and other Coal analysed at the Calcutta Assay OJficc. 
Denomination. 
English pit coal, 
2 Ditto on the large scale, 
New South Wales coal (average) 
Hurdwan coal, 
l^itto, another specimen, . . 
Ditto, (from China- kUri ,) . . 
Manipfir coal, Tank-kiouk , .... 
^ I owa or Iloshangabad ditto, . . 
^•lhet brown coal, (from Laour ,) 
Ditto, lighter colour — slaty, . . 
Ditto, soft friable bituminous, 
i as }’ a hills {Chirr a punji ) , best, 
• • •••••' 
10 
11 
12 
13 
11 
Ditto brown friable, 
■' * alatnu slaty coal, . , 
jtt°, without lustre, 
uarda Nal» Antt.ru,>; 
1 C 
17 
18 
18 
20 
21 
22 
23 
24 
25 
27 
28 
29 
30 
31 
Ditto 
slaty, 
arda Nala Anthracite, .... 
'•aghelpur ditto, 
Sohagpvir ditto, 
blliet bituminous shale, 
■tto, {Chirr a ptinji,') • ■ 
ya Jet coal, ( Kuenduen river,) 
Djtto Lignite, 
Diminalayan ditto, 
Ditto, dull 
ravaneore fossil seeds, 
blunese glance coal, 
1 to , earthy, blind coal, 
p 0 , e trom English coal, 
°ke from Burdwan coal, ( China-kuriJ . . 
aS 
u 
be 
o 
ya 
• M 
o 
<v 
(Z2 
1.273 
• • • • • 
1.277 
1.334 
• • • • • 
1.340 
1.361 
• • • • • 
1.398 
1.380 
1.348 
1.310 
1.520 
? 
1.457 
Water expelled on 
sand bath. 
Composition. 
Percentage of ash ii 
the coke made from 
each coal. 
Volatile matter, 
including water. 
Carbon. 
Aslies. 
1.5 
29.0 
69.4 
1.6 
2.3 
25.0 
73.0 
2.0 
2.6 
3.3 
38.0 
60.1 
1.9 
3.1 
8.0 
39.5 
45.9 
14.6 
24.0 
8.2 
41.5 
45.2 
13.3 
22.5 
8.0 
32.5 
61.1 
6.4 
9.5 
6.2 
39.3 
49.7 
11.0 
18.1 
> 
27.0 
58.0 
15.0 
20.5 
10.1 
44.4 
41.1 
14 5 
26.1 
2.8 
58.8 
28.6 
12 6 
30.5 
7.1 
42.2 
41.0 
16 8 
29.0 
7.0 
37.1 
62.0 
0 9 
1.5 
12.3 
38.4 
53.4 
8 2 
13.3 
36.0 
63.6 
29.2 
7 2 
20.0 
9.1 
37.4 
52.1 
10.5 
16.8 
7.1 
36.4 
54.1 
9.5 
14.9 
7.8 
43.8 
33.7 
22.5 
40.0 
10.0 
32.0 
40.5 
27.5 
40.4 
6.0 
25.0 
29.0 
46.0 
61.4 
22.0 
26.0 
52-0 
66.0 
6.3 
23.0 
6.6 
70.4 
91.4 
8.0 
40.0 
541 
5.9 
9.9 
5 0 
54.5 
43.0 
2 5 
5.5 
) ? 
51.0 
40.2 
8.8 
17.9 
•?i 0 
56.0 
37.5 
6.5 
14.8 
? 
52.0 
15.0 
30 
6.2 
) 3 0 
7.0 
91.6 
1 4 
1.5 
a 0 9 
7.0 
79 21 
13.7 
14.7 
j) V/. •/ 
a 0 
2.0 
91.5 
6 5 
6.7 
U U 
0 
0 
97.0 
21.0 
21.0 
