SO 



13000 



60 70 SO <?0 



A V 



/CO //O 



/soo< 



6000 



//o 



Fig. 5. White fir; South Germany; Sites I-IV; Normal Yield of 

 Main Stand in cubic feet per acre. Also the points indicating at what age 

 the average tree attains a diameter of 8", 10", etc., and a height of 60 ft., 

 70 ft, etc. Only wood 3" and over is here considered. 



154 





