RUBBER PLANTING 



141 



are drawn joining up PC, QT, RU> and SV. These 

 lines represent the positions of the original tapping 

 cuts. The lower lines will make angles of rather less 

 than 45 degrees with the horizon, but the slope will not 

 be so much less as to make any serious difference in the 

 result of tapping. 



G A C E G 



H 



D 

 Fig. 20. 



H 



This method of marking will be found more ac- 

 curate than that of measuring up from the ground, since 

 the ground level on different sides of the tree is liable 



