Am. Jour. ScL, Vol. XXXVII, 1889. 



Plate X. 



FJg. 20. 



VERTICAL LONGITUDINAL SE.CXI.OM 



Levels 5H& 6, Rooms-r-&>2: 

 Scale, 1 inch= 50 feet- 



Fig. 18. 



Main Drift Level 5 



VERTICAL LONGITUDINAL SECTION 



Shaft A, Level 6, Room 5. 

 Scale, linch= 50 feet. ■■ 



The intervals between the 

 horizontal'lines; a, b, c, d, e, / jp 

 f , g, represent sets 8 ft. high, j %, 



