J/egetahle Statich. loj 
trade fap in any plenty beyond their orifices ^ 
but as any fap is evaporated off, they can 
by their ftrong attraftion (aflifted by the 
genial warmth of the fun ) fupply the great 
quantities of fap drawn off by perfpiration. 
Experiment XXXVI. 
April < 5 th at 9. am, rain the evening be- 
fore, I cut off a Vine on a fouthern af- 
ped:, at a (Fig. 18.) two feet nine inches 
from the ground, the remaining ftem a 
had no lateral branches, it was | inch dia- 
meter, I fixed on it the mercurial gage ay. 
At II am, the mercury was rifen to 15 
inches higher than in the leg .v, being pufiied 
dovv^n at X , by the force of the fap which 
came out of the ftem at a. 
At4/>. m, it was funk an inch in the leg zy. 
April 7th at 8 a. m, rifen very little, a 
fog : at 1 1 a,m, 'tis 1 7 inches high, and the 
fog gone. 
April loth at 7 a, m, mercury 18 inches 
high 5 I then added more mercury, fo as to 
make the furface ^23 inches higher than x •, 
the fap retreated very little into the ftem, 
upon this additional weight, which ftievvs 
with 
