1883.] History of Anthracite Coal in Nature and Art. 
Lower A seam. 
Upper A seam. 
(R) Buck mountain seam. 
1880 
SECTION THROUGH SLOPE 2 UPPER LEHIGH COLLIERY. 
Counter gangway. 
Scale 400 feet to the inch, 
Tide elevation 1547 feet. 
Main gangway. 
Slope No: 2. 
Tide elevation 1787 feet 4 inches- 
NA 
Buck mountain seam, 
5 
7 
7 
/ 
(B. 
ed 
s10 
s 
Lower seam, approximate position- 
i 
