176 



FOREST PRODUCTS 



each year and, therefore, there is more and cleaner resin and much less 

 " scrape " which yields an inferior grade of rosin. 



2. The danger from fire is greatly decreased. Formerly ground fires 

 could easily get into the box cut in the base of the tree and would either 

 ruin the face for further turpentining or completely burn away the base 

 of the tree. The tree would then deteriorate and be unfit for lumber by 

 the time logging operations could move it to the sawmill. 



Photograph by V. S. Forest Service. 



FIG. 48. Method of collecting resin with the McKoy cup. A single apron is used to conduct 

 the resin from the face to the cup. This is moved up the tree after each season's opera- 

 tions. Walton County, Florida. 



3. The use of cups does not injure the vitality of the tree as does the 

 boxes. Often after severe boxing windfall results. The following Table l 

 shows a comparison of the number of dead trees and those blown down 



1 From the Naval Stores Industry, by Schorger and Belts, U. S. Dept. of Agric., Forest 

 Service, Bulletin No. 229, page 26. 



