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NEW YORK STATE MUSEUM 



contents, but as soon as we go back from the belt under consider- 

 ation the depth of the wells must be increased and the additional 

 trouble and expense of taking care of the water veins that are 

 found in the descent is greatly increased. The small gas veins 

 that are due in the lower horizons can no longer make anything 

 like an adequate return for the necessary expenditure, even when 

 the wells would be counted ordinarily successful if drilled in 

 shale territory. 



