ECONOMIC GEOLOGY. 89 



nearly resemble those in the Makum field. The prospect of success 

 will be greatly increased when better communications have been estab- 

 lished with the Brahmaputra, and it is to be hoped that the next 

 attempt in this direction will have a more fortunate result. 



The following list includes all the localities, that I am aware of, in 

 which oil has been observed* ;— 



(1.) Petroleum was found by Lieutenant Wilcox in the bed of the 

 Buri Dihing at Supkong, near the outcrop of a seam of coal (p. 3) . 



(2.) Several springs were discovered by Major White in the 

 N^mrup river below the outcrop of seams of coal (p. 5) . 



(3.) At Namchik Pathar, near the mouth of the Namchik river. 

 Captain Hannay observed petroleum close to where a seam of coal crosses 

 the bed of the stream (p. 9) . 



(4.) Petroleum rises, in at least two spots, on the bank of the Nam- 

 dang (Makum field), a little below its exit from the hills. 



(5.) Springs also occur at the debouchure of the Makum nadi from 

 the hills. When Mr. Medlicott visited these, the discharge of gas was 

 so copious and continuous, that when lighted it flamed almost without 

 intermission, but the discharge of petroleum was inconsiderable (p. 11). 

 Subsequently, when bore-holes were put down, the large quantities of oil 

 previously mentioned were obtained (p. 12). 



(6.) At a place called Bapu or Babu Bor Pung, which is, 1 believe, 

 in the northern part of the Tipam range, there is a superficial deposit of 

 earthy bitumen, evidently resulting from the saturation of the soil with 

 petroleum and inspissation of the oil. Specimens sent to me by Mr. 

 Greig contain from 35 to 80 per cent, of earthy matter. The mass is 

 said to be a few yards in diameter and about a foot thick. 



* The localities where oil has been observed during the progress of the survey are 

 marked in the accompanying maps. 



M ( 367 ) 



