Sterensonv] 



290 



fDsc. ISt 



below, all the way round its western and northern out-crop, from the 

 Central Ohio Railroad to Steubenville, on the Ohio River, and thence 

 down the river to Belleair, the iaitial point of the first section, where it 

 proved to be the No. 19 of that section My ideutiflcatiun of No. 8, of 

 the second section with No. 8 of the first has been called in question by 

 Prof. Andrews,* who regards the former as equivalent to No. 12 of the 

 Section I. No. 8, of Section II, is knowu as the Upper Barnesville Coal, 

 and No. 12, of Section I, is the Glenco Coal. As I take it, Goal X at 

 Glenco, is one hundred and ten feet above VIIIc (Glenco), while at 

 Barnesville it is one hundred and five feet above VIII (Pittsburg). There 

 should be no dispute respecting this matter. It is not so complex as to 

 require much skill for its determination. At Glenco, on the Central 



Coal XI — Ohio Railroad, nine miles west from Bel- 



leair, the coals are shown in the hill as in 

 the section on the margin, and hold the 

 same relations as in Section I. VIIIc dis- 

 appears under the railroad about two miles 

 west, and IX at about seven. X and XI re- 

 main above the railroad to Belmont, 20 

 miles from Belleair, where the road rises 

 above X. In the meantime XII is caught 

 by the hills near the. railroad. We are now 

 Interval 70' seven miles from Barnesville and the rail- 

 road summit intervenes. Ascending to the 

 Coal VIIIc I summit and descending thence to Barnes- 

 ville, we obtain the following sections. 



Interval 



CoalX. 



Interval 



Coal IX 



lOO' 



40' 



1. Shales and Sandstones "i in the 

 > Summit 

 Coal XIII, ) cut. 



Shale and Sandstone 



Coal XII 



Sandstone and some Shale 



Coal XI 



Sandstone, etc 



CoalX V...;. 



50' 

 V 



70' 



V 

 40' 



2'6" 

 98' 



3' 



70' 

 I'S" 

 30' 



3'4- 

 100'- 



4 + 



-No. 8 in the second section is> tlje, upper coal at Barnesville, and it cer- 

 tainly is the same with Noi_^,in kie first, which is the one marked X at 

 Glenco, where it clearly lies 110 feet above VIIIc, the Glenco coal. It is 

 evident then, since X is 110 feet above VIIIc at Glenco, and 105 feet 

 above VIII at Barnesville, that somewhere between these two points, the 

 strata below No. 11 of Section I, to No. 17 inclusive, of the same section, 

 have disappeared, bringing X about 90 feet nearer to VIII than it is at 

 the river. 



But this is not the full extent of this interesting alteration of relations. 

 If, starting from the railroad, we go through Belmont and Jefferson 



* See Prof. Andrews' rejoinder to Prof. Newberry, Amer. Journ. Sci., Jujy, 1874. 



