io6 



FOREST COMMISSIONERS REPORT. 



Table 6. — Diameters of paper birch at 5-foot intervals above the ground, 

 based on measurements of S54 trees. 



60-FOOT CLASS. 



Diameter 

 breasibigh 



Height above ground. 



5 feet. 10 feet. 15 feet. 20 feet. 25 feet. 30 feet. 35 feet. 40 feet, 



Diameter outside bark. 



Inches. 



6 



7 

 8 

 9 

 10 

 11 

 12 

 13 



Inches. 

 3.4 

 3.9 

 4.3 

 4.7 

 5.2 



o. i 

 6.4 

 7.1 



70-FOOT CLASS. 



Diam- 

 eter 

 breast- 

 bigb. 



Heigbt above ground. 



5 feet. 10 feet. 15 feet. 20 feet. 25 feet, i 30 feet. 35 feet. 40 feet. 45 feet. 50 feel 



Diameter outside bark. 



eO-FOOT CLASS. 



Diameter 

 brea.sthigh. 



feet. 



HelglU above ground. 



10 

 feet. 



14 

 feet. 



20 

 feet. 



feet. 



30 

 feet. 



feet. 



40 

 feet. 



45 

 feet. 



50 

 feel. 



55 

 feet. 



Diameter outside bark. 



60 

 feet. 



