44 MALLET : COAL-FIELDS 0¥ THE NAGA HILLS. 



second time (as in the Leap nadi), but this does not affect the question 

 on the large scale. It is^ therefore^ only a narrow fringe along the out- 

 crop that is of any practical value. Further, until much more has been 

 done towards opening out the fields, it will be impossible to arrive at 

 any just conclusion as to the total average thickness of coal in each ; 

 and hence it is impossible at present to form any reliable estimate of 

 the total quantity of available coal. But failing this, if it can be shown 

 that there is every prospect of a supply of coal equal to all probable 

 demands for a long time to come, it will suflSce for present purposes. 

 This the information now at command enables us to do. A large 

 amount of coal can be indicated which may be depended on with reasonable 

 certainty, although the total available quantity may possibly greatly 

 exceed this. The minimum quantity to be expected can be pointed out, 

 but not the maximum. 



In the eastern part of the field it will have been seen that there 

 is almost certainly at least one very thick seam everywhere present from 

 the Tirap quarries to the Namdang. Even supposing that the Tirap 

 seam does not extend west of Leap — that it is lost by a fault or dies 

 out, the latter of which suppositions is certainly not indicated by a 

 thickness of nearly 40 feet where last seen — there is then the Tikak 

 seam and that at Rangring, which is not improbably the same as the 

 Tikak one, and further on the seam ii^ the Namdang. But it is quite 

 possible that the Leap may continue to the west below the Tikak, and 

 the latter towards the east, and that there are thus at least two thick 

 seams in the same part of the field. Taking into count, however, only 

 what is actually known, we have the following measured thicknesses : — 



Ft. In, 

 Tirap seam north of Watto + seams in Leap Nadi ( 25' + 7' + 4') 36 

 Seam south-east of Leap 

 Seam north-east of Tikak 

 Seam west of Tikak 



Seams west of Rangring ( 21' 9" + 4' ) ... 

 Seam south of Rangring 



^ Average 35 



( 312 ) 



.. 37 







15 



6 



.. 22 



6 



.. 25 



y 



... 75 







