Lesley.] 



378 



[Dec. 15, 



(Continued from page '675.) 



tlie old filled up valley of the Tunauqiiiuit, at Taiport, McKean Co. Pa. 

 from 200' to 300' of tliis {•asin2; is rcciuirod in cacli well. 



Wells are spoken of iiulLscriiniiialely as "small holes" or "wet hole.s" 

 on the one hand, and as "cased holes " or "dry holes " on the other. A 

 "small hole" must necessarily be a "wet" one, for there is no room to 

 case off the water while drillinu" ; and a " rased hole " must neeessarily be 

 a "dry " one, if the casing accomplishes the purpose for which it is used. 



If now a well is to be drilled " wet, " that is if no effort is to be made to 

 shut off the water which comes into it from the second division men- 

 tioned above, to keep it from following the drill down to the oil rocks, then 



