CH AFTER IV. 



ECONOMIC. 



Section XIII. — Coal. 



Quantity. — We may assume that underlying the Karnthis there is 

 coal, hut it would be a hazardous thing to give an opinion as to its limits, 

 in face of the fact that the measures are overlapped. On this account 

 I shall not attempt to offer any decisive opinion as to the total quantity 

 of coal in the Chanda district ; but will confine my remarks to only such 

 portions of the field in which coal has been shewn to exist. 



Beginning with the Warora basin, it appears from a memorandum 



supplied to me by Mr. Ness early in 1874, that at 

 Warora basin. 



that time — 



Proved area of coal ... ... ... ... 420 acres. 



Average thickness of coal ... ... ... 12 feet. 



One foot in thickness gives per acre ... ... 1,450 tons. 



Quantity of coal=420 x 12 x 1,450 ... ... 7,300,OOo „ 



Allow for loss in working, 30 per cent. ... ... 2,190,000 „ 



Total coal available ... 5,110,000 „ 



More recent estimates based upon the evidence of the latest borings 

 raise the quantity of coal to 20 millions, which I think is quite within 

 the mark. A certain amount of latitude must be allowed for the accur- 

 acy of any calculation that attempts to shew how many millions of tons 

 are stocked under ground, for the borings do not indicate that there is 

 a constant thickness of coal. By taking 12 feet only, however, exagger- 

 ation cannot be imputed to the estimate. 



The extension of the basin to the south can only be assumed. Bore- 

 hole UI, which is to the south of all the others, proved 47'-6*' of coal 



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