840 



JOURNAL OF FORESTRY 



A tie volume table was constructed by the writers to show the num- 

 ber of ties to be obtained from each diameter and height class. Suffi- 

 cient trees were cut to make between 900 and 1,000 ties, and from the 

 measurements obtained the following table was prepared : 



Volume Table for Railroad Ties — Larch and Douglas Fir (Kootenai. Cabinet. 

 and Pend Oreille National Forests), Showing the Number of Each Class of 

 Ties per Tree from 12 to 16 inches d. b. h.. Inclusive 



For sawed or hewed ties 

 D. B. H. 



13- 



14- 



16. 



Ties 

 per 



9 

 10 



Tie classes. 



No. I. 



No. 



No. 3. No. 4. 



No. 



There is a slight difference in the form factor for larch and Douglas 

 fir in tie-size trees, but the diiference is not sufficient to affect the grades 

 of ties to be obtained from trees of the same diameter and height class. 



