ECONOMICAL GEOLOGY. . G7 



4. Kinderhook shale 222 



5. Devonian shale and limestone 19 



G. Niagara limestone 75 



Total depth. 1.002 



The boring now being prosecuted there in search of natural 

 irns. is said to be down 1,600 feet, which, if true, would carry 

 the drill into the sandstones below the Trenton limestone, and 

 therefore quite through all known gas-producing horizons. The 

 St. Peter's sandstone which was encountered at the depth of 

 1,055 feet at Beardstown, must be found within thirteen or four- 

 teen hundred feet of the surface at Jacksonville, and below that 

 sandstone neither gas or oil has been found as yet in the Uni- 

 ted States in sufficient quantity to render ite exploitation a 

 matter of practical importance. 



