182 



FOREST PRODUCTS 



YIELDS 



The Census Bureau of 1909 shows the following yields of turpentine 

 per crop of 10,500 boxes for each of the principal states in the South 

 producing naval stores: 



YIELD OF TURPENTINE PER CROP BY STATES 



Yield of Turpentine per 



State Crop of 10,500 Boxes. 



Barrels 



Alabama ............ ........................... 35 6 



Florida ........................................ 29.8 



Georgia ........................................ 26.5 



Louisiana ...................................... 44-7 



Mississippi .......... . .......................... 34-5 



Texas ......................................... 43-5 



The larger yields shown in the above table from the forests of Louisiana 

 and Texas are undoubtedly explained by the fact that the timber in those 

 states is much larger than the timber now being bled in the other states. 

 Consequently, the yield would naturally be much larger per crop. 



From Schorger and Beits. 



FIG. 52. Diagrammatic cross-section of a turpentine still. The barrels of resin are brought 

 in from the forest and, after unloading on the platform on the right, are emptied into the 

 kettle on removal of the cap. The turpentine is collected in the barrel at the right. 



A crop will generally yield from 29 to 46 barrels of turpentine and 

 from 163 to 234 barrels of rosin, depending upon the year of tapping. 

 It is obvious that the yield of turpentine will be much greater during 

 the first year of tapping and the same is true of the yield of rosin. Con- 

 siderable depends upon the method of tapping, that is, by the box or the 

 cup system. 



The yield of crude turpentine or rosin is generally about 8 to 12 Ib. 

 per box, or about 20 to 25 Ib. from a tree of average size where two faces 

 are exposed. 



