72 



OIL SPEINGS. 



tation having been crushed by a similar process. Be that as 

 it may, in several parts of the States, as well as in Canada, 

 enormous pits exist full of this curious oil. It is obtained by 

 boring in the ground in those spots where the oil is likely to 



A. ROCK-OIL SPRING. 



be found. Often, however, the speculator, after spendino- 

 time and capital in the experiment, finds that no oil appears 

 at his call. 



In some spots, where it was first discovered, after the 



