SO 60 70 SO 



IOO 



7000 c.^r. 

 6 00 



130 



7000 



60 



00 



-eooo 





/ooo 



3V 6O 70 I/O 90 /OO "0 



/30 



Fig. 3. Pine; North Germany Sites I-V; Normal Yield of main stand in cubic feet per 

 acre. Also the points indicating the age at which the average tree attains a diameter oi 

 8", 10", 12" and a height of 30 ft, 40 ft., etc. Only wood 3" and over is here considered. 



152 



