<uo 



RKSIX-TAPPING. 



3. Mrfhnd (,/Ci(ttiii;i the Gvooves. 



Commenciug at the grounJ-lovel, the grooves ascend the stem 

 as follows : — 



The width of the groove is 9 

 first four years, and 8 centimeters 

 Its depth must never exceed 



Roman figures refer to successive years' 

 tappings. 



he extracted from them. With 

 live and sometimes six grooves, 

 in the same tree (fig. 289). 



Pines are tapped without being 



centimeters (3 inches) for the 

 (2^ inches) in the last yeav. 



1 centimeter (f inch) when 

 measured below a string 

 stretched across the groove 

 from the base of the bark. 

 The number of grooves 

 cut at the same time in a 

 tree vary according as the 

 tree is tapped without kill- 

 ing it, or tapped to death. 



Pines which are intended 

 to be removed in thinnings 

 and those which arc con- 

 sidered mature are tapped 

 to death. Such pines 

 should remain standing for 

 only a few years, and the 

 greatest possible amount 

 of resin should therefore 

 this object, two, three, four, 



according to its size, are cut 



killed when they are intended 



