1 3 % Vegetable Stanch. 
m oft to a vapour, before it can enter them* 
the Sun's warmth on the bark fhould moft 
eafily difpofe ftich ratified fap to afeend, in- 
Head of defeending. 
Experiment XLV. 
July 27th, I took feveral branches of 
Currans , Vines , Cherry , Apple, Tear and 
Tiuwb-tree , and fet the great ends of each 
in vefiels of water x 9 (Fig. 31.) but firft 
took the bark for an inch off one of the 
branches, as at z, to try whether the leaves 
above z at b would continue green longer 
than the leaves of any of the other branches 
a, c y d 5 but I could find no difference, 
the leaves withering all at the fame time : 
Now if the return of the fap was flopped 
at then it would be expected, that the 
leaves at b fhould continue green longer 
than thofe on the other branches 5 which 
did not happen, neither was there any moif- 
cure at z. 
Experiment XLVL 
In Augufty I cut off* the bark for an inch 
round, of a young thriving Oak-branch, 
on the North- Weft fide of the tree. The 
leaves of this and another branch, which 
had 
