22 
BALL AND SIMPSON: COALFIKLDS OF INDIA. 
coal is brownish-black in colour and contains many specks of 
fossil rosin. Analyses of two specimens gave the following results : — 
As the coal is of extremely poor quality, and is distant 12 miles — 
as the crow flies — over difficult country from Lumding on the Assam- 
Bengal Railway, it does not appear that the deposit at the present 
time is of much economic importance. 
Dissoma and Diyang rivers. — Coal in these localities was reported 
on by Dr. Saise in 1904. On the Dissoma there are two seams of 
lignite, respectively 3 feet 101 inches and 3 feet 3| inches in thick- 
ness. The mean of two analyses of the coal gave : — 
Moisture 13-00 
Volatile matter 34-90 
Fixed carbon ....... 46-30 
Ash 5-80 
The seams dip steeply at angles of 37° and 25° respectively. 
Dr. Saise did not consider them workable at a profit considering 
the nearness of the locality to the vast supplies of superior fuel in 
the Naga and Patkoi hills. 
On the Diyang occur two discontinuous seams of lignite of poor 
quality varying from 6 to 18 inches in thickness and dipping at 
45° and 80° respectively. They were pronounced worthless. 
Namhor and Doigruncj rivers. — About 8 miles above the falls 
on the Nambor river a small patch of coal-bearing rocks (Creta- 
ceous or Tertiary) occurs. Coal is exposed in the river bed in 
three places, but owing to the broken section Mr. Smith considered 
that they may be outcrops of the same bed. The minimum thick- 
ness in the best- exposed section is 7 feet and the seam dips at an 
angle of 8°. The average analysis of three samples is : — 
Moisture 10-05 
Volatile matter 31-58 
Fixed carbon ....... 26-94 
Top o£ seam. Base o£ seam. 
Moisture 
Volatile matter 
Fixed carbon 
Ash . 
5-36 
49-96 
25-32 
19-36 
3-88 
57-52 
25-40 
13-20 
Ash 
31-43 
The samples were taken from under water and therefore the 
quality of the coal may be better than the analysis indicated. 
