NAVAL STORES 



169 



NUMBER OF ESTABLISHMENTS AND QUANTITY AND VALUE OF TURPEN- 

 TINE AND ROSIN PRODUCED UNITED STATES 



(Figures taken from reports of the Bureau of the Census) 



1 According to " Naval Stores Review " of Apr. 4, 1914. 



The following table shows the quantity and value of turpentine and 

 rosin exported from this country for the various years from 1860 to 1913: 



QUANTITY AND VALUE OF SPIRITS OF TURPENTINE AND ROSIN EXPORTED, 



1860-1913 

 (Figures from the Bureau of the Census) 



1 Turpentine included with rosin. 



WOODS OPERATION 



For many years the unit of woods operation has been the " crop/' 

 which consists of an orchard of 10,500 boxes or faces. The area included 

 within the crop varies considerably with the density of the stand, the size 

 of the individual trees and the intensity of the boxing (number of boxes 



