THE NAVAL STORES INDUSTRY. 23 



TABLE 10. Net rosin sales from eight half crops, season of 1902, Georgia. 



The first year crop mentioned in Tables 9 and 10 was worked for 

 two years longer. The combined yields obtained for the " cupped 

 half" and " boxed half" during the 3-year period of operation are 

 given in Tables 11 and 12. 



TABLE 11. Spirits of turpentine from half crops, seasons 1902-1904, Georgia. 



TABLE 12. Net sales of rosin from half crops, seasons 1902-1904, Georgia. 



RELATIVE AMOUNTS OF SCRAPE FORMED BY THE BOX AND CUP 



SYSTEMS. 



The resin obtained from trees turpentined by the box method must 

 flow an increasingly greater distance each year the tree is tapped. As 

 a result the amount of scrape formed is proportionately increased. The 

 proportion of scrape formed by the two systems is shown in Table 13. 



