TAPPING MA1UTIMK PINES. 



713 



according as the tree is tapped without killing it, or tapped 

 to death. 



Pines that are intended to be removed in thinnings and 



Fig. 378. Palot. 



Fig. 37H. Fspatule. 



Til 



those which are considered mature are tapped to death. 



Such pines should remain standing for only a few years, 



and therefore the greatest 



possible amount of resin 



should be extracted from 



them. With this object, 



two, three, four, five and 



sometimes six grooves, 



according to its size, are 



cut in the same tree 



(Fig. 380). 



Pines are tapped with- 

 out being killed, when 

 they are intended to re- 

 main for some time stand- 

 ing in a wood. They 

 must be tapped so that 

 their existence is not 

 compromised, nor their 

 vigour seriously diminished. It is therefore best, in this 

 case, to make only one groove in a tree at a time. When, 

 after five years, this groove is 3 meters 80 centimeters 

 (about 12J feet) high, it is left untapped for several years, 

 and then another groove commenced at 15 or 20 centimeters 



Fi.tr. 3so. 



Roman figures refer to successive years' 

 tappings. 



