464 



LOGGING 



The average value per cord, f.o.b. car, was $8. 



The approximate yield of bark is one cord from 1500 feet, log 

 scale, Doyle rule. The yield from individual trees in the Appa- 

 lachian region is as follows: 



YIELD OF BARK IN RELATION TO DIAMETER OF TREE^ 



From Chestnut Oak in the Appalachians. Circular 135, U. S. Forest Service, p. 

 2240 pounds. 



TANBARK OAK 



The tanbark oak is a native of southwestern Oregon and of 

 California, where the harvesting of tanbark has been an im- 

 portant industry for many years. The peeling season begins 

 about May 20 and lasts until the middle of August, although it 

 can be done best during the latter part of the season for the 

 bark is then tougher and does not break readily. 



There is a variation in the length of the peeling season, be- 

 cause the trees are very sensitive to changes in temperature. 

 Individual trees also show a decided difference in their peeling 

 qualities. 



Peelers work in pairs and use only a single-bitted ax. The 

 tree is first girdled at 4 feet above ground, again at the ground, 

 and the bark then slit and pried off with an ax. The tree is 

 then felled and the bark ringed and peeled off in the same man- 

 ner as in hemlock. The work is continued up the bole until 

 the bark becomes less than | inch in thickness. The "coils" 

 of bark are laid on the ground, bark side down, and allowed 



