LONGLEAF PINE. 



25 



of 9.6 pounds per face, of which 8.3 pounds were dip and 1.3 pounds 

 scrape. The timber as a rule is old and very slow growing, but was 

 worked conservatively. 



UNPROFITABLE TURPENTINE PRACTICES. 6 



TYo-rlcing small-shed trees. — The figures given in Table 12 refer 

 to young longleaf pine timber in southern Georgia, and show the 

 weight of gum in cups ready for the first dip after six streaks. The 

 trees ranged from 7 to 12 inches in diameter (measured at breast 

 height, or 4| feet above the ground) ; each tree was hung with one 

 cup and was being worked for the first year. The production for 

 the season is computed on the assumption that there were six dip- 

 pings. 



Table 12. — Yield of yum per cup in the first dip, and computed yield for the 

 season from different-sized trees. 



Diameter 

 of tree 

 (breast 

 high). 



Yield of gum per cup. 



Per dip (6 



streaks). 



Per 



streak. 



Per sea- 

 son, 6 

 dippings 

 (com- 

 puted). 



Inches. 

 17 

 18 

 19 



1 10 

 ill 

 112 



2 10 

 2 11 



2 12 



Ounces. 

 10.0 

 15.0 

 19.0 

 22.5 

 23.0 

 24.0 



36.0 

 43.0 

 48.0 



Ounces. 

 1.7 

 2.5 

 3.2 

 3.7 

 3.8 

 4.0 



6.0 

 7.1 

 8.0 



Pounds. 

 3.7 

 5.7 

 7.1 

 8.5 

 8.7 

 9.0 



13.5 

 16.1 



18.0 



One-cup trees. 



2 Two-cup trees. 



The most noteworthy point here is that a 7-inch tree yields less 

 than one-half the gum yielded by a 10-inch tree. Of the 10-inch trees 

 those with two cups yielded 60 per cent more gum than those having 

 only one cup ; of the 11-inch trees, they yielded 87 per cent more; and 

 of the 12-inch trees, they yielded 100 per cent more. In operations 

 on small timber the expense of cups, hanging, chipping, and dipping 

 is incurred in connection with many trees that yield only about a 

 quart of gum for a full season's working. Even smaller returns than 

 those shown above are not uncommon. In May, 1920, third-year 

 working- of these small sizes were found that yielded at the rate of 1 

 oimcc of gum to each four streaks. The conclusion arrived at from 

 these weighings is that, in general, timber less than 9 inches in 



•The (ttSCOMlOD in l>;iw<] upon kIikIIck and ri-<-omm<n<lat Ions by Austin Cary. Logging 



Bnglneer of the Forest Service. Bee alio " n ,- w Method of Turpentine Orcharding," For 



Service Bulletin 40. For sale h.v Htipcrintewiinl of Documents, (lnvcrniiiriil 1'ilntlng 



Office, Washington, i>. C. Price, 10 <-<'niH. 

 88027°— 22 4 



