PART 1.] 
Hughes : On raw materials . 
23 
Beverting to the Baniganj coals, the following is the result of the analyses of their ashes, 
and for the sake of illustration I subjoin a selection of a few Welsh and Scotch coal ashes:—* 
Silica. 
Alumina. 
Oxide of 
iron. 
Lime. 
Magnesia. 
Sulphur! c- 
aeid 
Phosphoric 
acid. 
Dnmarkucda 
60*54 
31*0 
1*21 
*94 
•55 
•54 
Sanktoria 
58-00 
2903 
7-49 
326 
1*11 
1-46 
Banal! 
... 
92-77 
30-48 
3-32 
3*13 
*47 
1*2 
Baniganj 
61 41 
25*64 
5 31 
318 
- 
-52 
*35 
Mangalpur 
... 
5966 
2672 
8-08 
2-92 
~ 1 
1*2 
1T8 
Dowlais. 
Dowlais. 
Dowlais. 
Dowlais. 
Pou*ypool 
ro»;k vein 
coal. 
Ebbw vale 
four-feet 
steam 
coal. 
Fifes?; ire 
Fordet 
splint 
e-.ai. 
Silica 
... 
who 73 
2413 
3761 
3964 
40-00 
53-01 
37*60 
Alumina ... 
41*11 
20"82 
3543 
3sr»n 
44-73 
35*01 
52-»:o 
Sesquioxide of iron 
- 
1115 
26U0 
14-73 
1P8*J 
Lime ... 
2-75 
9-33 
2-53 
1"S1 
lrOO 
3*94 
3-73 
Magnesia 
2-65 
9-74 
2*71 
256 
Trace ... 
no 
110 
Sulphuric acid ... 
... 
— 
44* 
3*37 
CT29 
Traces. . 
2" 22 
4*89 
414 
Phosphoric acid 
- 
0-99 
0-21 
2"00 
3*01 
0"75 
G*SS 
0 63 
It will be seen that the proportion of phosphoric acid in a hundred grains of the ashes of 
some of our Indian coals compares favourably with the English equivalents; but we must 
bear in mind that Indian coal is burdened, as a rule, with three to four times the amount of 
ash in English coal; and consequently for equal weights of coal the comparison is not so 
favorable. 
Sanatoria coal calling .—Only one o: the five selected coals, that cf Sanktoria, is 
truly caking; the rest yield nothing tetter than bastard coke. Analysis shows that the 
Dumarkdnda coal is a first class Indian coal; ani I believe that h would p; : lu:e a very fair 
description of coke provide.! the ovens were charged with freshly raised materia;.'* - 
• Perce's Metaliorgv, 1561, V I, pare 106. 
t Since writing the aboTe I bare received freer C-:'. .cel Hjoe. E. E, a rai shewing the relative heating :■ - :r 
of the several coals submitted fer trial at the Mint: being of the s ame samples as these e: h in the 1ah iratcrr 
of the Geological Server bj Mr. Tween. The I . : - 1. e.i ccal _ ;.- . the seventh plate in a hit of W-T. 
Same U CoDiay. “ih Entaaxs. 
F.inisanj 
9.786 
Upper ecal measures. 
Babusol 
9.732 
j. 
KiaKhi 
... 
_ . 
9.651 
Sanktcria ... — 
_ 
9.622 
, 
B 
Lhasa 1 seam . Cnowkidinga 
_ 
9-5e4 
Berodakarta ... ... 
... 
9.552 
Ddmarknnda 
9.463 
Lower 
Mansalpur 
... 
9.144 
Upper 
Sitarampur 
9.013 
Xisia ... ... 
fM*e 
Bar.41! 
... 
— 
8,546 
*» 
» 
S3 
