Experiment III 
The single method again compares badly, only 5 incisions were 
opened daily hence the long period, 23 days, of tapping. As com- 
pared with trees of the same size it will be noted that the oblique 
incisions were on alternate days. The advantage of tapping on 
alternate days is also shown with the herring-bone method both 
morning and evening tappings. 
