144 THB ORIGIN OP CREATION 



accumulating gases through the strata ; examples of which may 

 be seen at many mines, arising from the fissures in the strata ; 

 end sometimes when the crop is covered with water, the gag 

 boils through it, and may be collected and burned in the 

 atmosphere. 



In conclusion, great fears have been entertained that the coal 

 supply of the world will run out, but we believe, that like every 

 other production of nature it is inexhaustible. By the time 

 the present coal seams are worked out, fresh seams equally as 

 good may generally be found in the same vicinity. Fresh 

 deposits also are continually being discovered, and there is no 

 doubt but that fresh fields are at the same time continually- 

 being formed, 



