PAKT 2.] 
Ball: Bisrampur Coal-field. 
39 
The only other trap dyke is seen in the Rehr section, where it runs for about a mile 
along the northern bank of the river, below Pachira. At the 
east end of the reach it has been flung to south by a small fault. 
Both the above are coarsely crystalline diorites. 
Rehr dyke. 
Building stones. 
Many seams worthless. 
V.— Economic Resoukces. 
With the exception of building stones which are of the usual character found in the 
Barakar and Talclur rocks, the economic resources of the Bisram- 
pur coal-field are limited to coal. 
Prom the imperfection of the sections, and the difficulty of identifying the partially 
exposed coal seams at different localities, any attempt at a tabular statement of the number 
of seams would only tend to exaggerate the importance of a large proportion of them, which, 
while they will in all probability prove to be worthless, cannot 
at present, from the limited data which we possess regarding 
them, he individually asserted to be so. 
It may be regarded as an established fact that good coal does exist in fair abundance, 
„ , , and from the horizontally of the seams, in a suitable condition 
Good coal. . . 
for working. But borings can alone furnish facts sufficiently 
Borings. reliable for estimating the extent and thickness of individual 
seams, and generally the total amount of coal existing in the field. Such borings at a few 
well selected sites, would, in consequence of the undisturbed character of the beds, and 
the comparatively small thickness of the whole formation, give conclusive and exhaustive 
information as to the amount of coal obtainable. 
To prove the individual seams which, as at present exposed, are the most promising, I 
would recommend borings being made on the west bank of the 
Mahan, a mile and a half north of Chendiii; on both banks of 
the Mahdn at Bliagara, and on the southern bank of the Pasang, north of Jaldega; and from 
these points in whatever directions the original results would render it probable that the seams 
extended. 
Points for boring. 
Por proving the total amount of coal throughout the area occupied by the coal measures, 
borings should be made all across it. It is at present hardly necessary, however, to go fur¬ 
ther into the question, as the probability of this hill-surrounded area being ever the seat of 
mining enterprise is so slight that the existence of coal there in whatever quantity can 
hardly be said to have any immediate importance from an economic point of view. 
The coal-fields below the plateau in the Mand valley, ninety miles to the south, are the 
only localities in Western Chota Nagpur which are ever likely to he made use of by any 
railway connecting Calcutta and the Central Provinces. 
The following is the result of the assays of coals from five localities :— 
Coal Seams. 
Carbon. 
Volatile. 
Ash. 
1 . 
Rehr river near Panri 
... (water 5o) 
577 
38-2 
4-1 
2. 
Pasang river, J&inuergur and Kurada road 
5G'2 
37 
68 
3. 
M£h£n „ Bhagftr# 
50‘2 
33 
16-8 
4. 
„ „ north of Chendia 
485 
324 
191 
5. 
M6s£n „ 
... (water 4) 
455 
316 
229 
