ONWARD TH ROUGH THE AGES. 



137 



3 dip away from No. 1. No. 4 and C are generally nearly 

 horizontal, except in the vicinity of mountain disturbances. 

 Now, by keeping in mind the dips of the several strata, 

 and tracing each, in conception, underneath those which 

 cover it, the reader will be able to present to his imagina- 

 tion a sort of stereoscopic view of the underground struc- 

 ture of the Northern States. 



I have now- 



leaving out of the account the debatable 



Fig. 59. Hugn Miller, tJie beoicn Geologist. 



