THE I3AIIAKAHS. 
184 
A study of these fiourea leads to interesting,' conclusions. In 
the (irst place it is noticeable that the Hanhat coals arc j^enerally 
much inferior to the Kurasia coals, the Sanhat coals being nuich 
higher in ash, and lower in lix(>d carbon and volatile matter than 
the Kurasia coals ; it is, indeed, evident on the basis of these 
figures that . attention should first be directed to the Kurasia 
field. A comparison of the Kurasia analyses with those of coals 
from the Raniganj measures of the Kaiiiganj field, as given in the 
foregoing table, indicates the close resemblance between the coals 
of these two fields. Except that they show higher moisture, the 
Kurasia coals of seams 3 and 4 are very close in composition to 
that of the lower seams of the Raniganj series, but are about 2 
per cent, better in ash. 
A glance at the average analyses of horizons 1 to 5 of the 
Kurasia section of the Kurasia field reveals another interesting 
point. The amount of moisture decreases steadily from 10 to 
under 5 per cent, in passing from horizon 5 to horizon 1. This 
decrease may be compared with the decrease from 6-8 to 1-06 per 
cent, in passing from the upper Raniganj seams to the Barakar 
scams in the Raniganj field (see above). It is also interesting to 
notice that the Sanhat coals, which occur near the base of the 
field, contain the same general percentage of moisture as horizons 
1 and 2 in the Kurasia field. 
According to the laboratory tests, almost all the Korean coals 
^ ^. ^. ^ are non-caking, so that this coal cannot be 
"lo I'lop ' i*^'- regarded as suitable for metallurgical purposes. 
Pyrite is often seen in the Korean coals, especially in the seams 
Sulphur bright coal. The only determinations of 
sulphur hitherto made are as follows : — 
Sample K. 9 — Seam 3A — Kaoria Nala . . . 0-70% S 
K. 13— Seam 5— Kaoria Nala .... 0-28% S 
K. 33 — Upper seam — Bijaura Jharia . . . 0-62% S 
K. 35 — Lower seam — Bijaura Jharia . . . 0-79% S 
No tests have yet been made of the calorific values. But using 
Goutal's formula, one can deduce from the average composition given 
Cal rific value V^S^ 183 a calorific value of 6,217 calories 
for the average coal of the Kurasia field and 
6,512 calories for the average of the Karar Khoh seams. These 
values compare favourably with those for Bengal coals. The 
Sanhat average gives a much lower value, namely 5,674, 
