CLASSIFICATION OF MINERAL LANDS. 



71 



a b 



a b 



a h 



I'll" 



I' 6" l'4" 



2" 



10" 8" 

 2" 



I' 10" I'lO", 



I' 3" 



S= 2'6" 



4' 4' 



4'0" 



10" 



3' 9" 3'9" 



I '4" 



I' 7" 3" 



ZHO" 



5' 9" 



Figure 2. — Diagram showing split or broken beds and their value for classification : a, 

 measured thickness; b, equivalent thickness used in classification and valuation. 



