31^ 
The  result  of  a further  experiment  conducted  on  somewhat  diff- 
erent lines  are  shown  in  Table  22.  In  this  case  only  one  V incision 
was  made,  tins  being  at  3'  from  the  ground  while  on  the  opposite 
side  of  the  ?^ame  tree  a similar  ii  cision  was  made  at  6'  from  the 
base.  On  the  following  day  the  incision  at  3'  from  the  base  was 
reopened  while  on  the  opposite  side  of  the  tree  a new  incision  was 
made  6"  below  the  first  incision.  Tapping  operations  were  con- 
tinued daily  in  this  manner  until  the  base  of  the  tree  was  reached 
when  the  incision  at  3'  from  the  ground  had  been  renewed  on  12 
