HORIZONTAL SECTIONS. 



features being sketched in as we proceed of this, the 

 copy of the level-book given below will afford an illus- 

 tration. 



From Milestone 1ST. 35 W. passing by Church. 



It will sometimes occur that the face of a cliff or 

 quarry, of a sharp or rugged slope, is such that it cannot 

 possibly be measured with the chain. The height must 



