Whittlesey.] 



196 



[November 18, 



along six converging lines, from the outcrop to the centre of the 

 field, would appear to much better advantage on a map. A plan is 

 still more necessary to exhibit clearly the results of the triangulations 

 I have already given. In the absence of maps and profiles I recapit- 

 ulate in a tabular form the inclination of the strata, both as to the 

 direction and the rate per mile, over the first geological district. 

 Running the eye down the column of dip, it will be seen at a glance 

 that there is no instance of a plunge of the beds to the west yet dis- 

 covered, in a region where at least four general undulations are 

 reported, the axes of which are supposed to be north and south. 



Resume of the Triangulations. 



NO. OF 

 TRIANGLE. 





TOTAL 



DIRECTION 



RATE OF 



COUNTIES. 



LENGTH OF 



OF PLUNGE 



DIP PER MILE 





SIDES, MILES. 



OF STRATA. 



IN FEET. 



1 



Coshocton and 











Holmes. 



81 



S. 55° E. 



2 



2 



'( 



69 



S. 26° E. 



22 



3 



Tuscawaras. 



24 



N. 80° E. 



UM 



4 



i( 



37 



S. 32° E. 



15& 



5 



«' 



Local. 



. S. 720 E , 



25 



6 



Stark. 



" 



S. 43° E. 



86 



7 



« 



H 



S. 71° E. 



15& 



8 



Summit. 



" 



S. 23>£° E. 



9 



9 



Summit, 

 Stark and 











Mahoning. 



112 



S. 53° E. 



s% 



10 



Summit,, 

 Mahon'g and 

 Trumbull. 











99 



S. 12° E. 



20>£ 



11 



Mahoning. 



27 



S. 22» E< 



14 



12 



«< 



25 



S. 37° E. 



13 



13 



« 



Local. 



S. 18° E. 



16K 



14 



Columbiana. 



" 



S. 10° E. 



30 



15 



« 



u 



S. 20° E. 



16 



16 



« 



u 



S. 50° E. 



57 



16a 



a 



" 



N. 70° to 80° E. 



80 to 100 



17 



Jefferson. 



a 



S. 37° E. 



23 



17a 



Belmont. 



a 



S.. 450 E.. 



53 



The second main anticlinal of the Report is located under Carroll 

 County. Near its west line, at Canonsburg, No. 6. is about 450' A., 

 but not very well determined. Five miles nearly west, at New Cum- 

 berland, its elevation is given in the Report at 44 1'. On the east line 

 of the county, at Dianon, two miles west of Salineville, No. 6 of the 

 Report is 40 1' (W.), being distant from Canonsburg nineteen miles; 

 course north 60° east. This line passses through Carrollton, the 

 elevation of which has not transpired. Near New Market, thirteen 

 miles south of Carrollton, where it dips beneath the surface, it is 

 about 400' A... and at Rochester, fifteen miles nearly north, 560'.. 



