1 14 Vegetable Staticks. 
It is needful to fhade all the cemented 
joints from the Sun with loofe folds of 
paper, elfe its heat, will often melt them , 
and fo dilate the cement, as to make it 
be drove forcibly up the tube , which de- 
feats the Experiment. 
The Vines to which the tubes in this Ex- 
periment were fixed, were 20 feet high from 
the roots to their top 5 and the glafs tubes 
fixed at feveral heights b from the ground, 
from fix to two feer. 
The fap would rife in the tube the firfl: 
day, according to the different vigor of the ; 
bleeding ftate of the Vine, either i, 2, 5, 
1 2, 1 5 , or 2 5 feet 5 but when it had got to its 
greateft height for that day , if it was in the 
morning, it would conftantly begin to fub- 
fide towards noon. 
If the weather was very cool about the ' 
middle of the day, it would fubfide only 
from II or 12, to two in the afternoon 5 | 
but if it were very hot weather, the fap i 
would begin to fubfide at 9 or 10 a clock, j 
and continue fubfiding till 4, 5, or 6 in the 
evening, and from that time it would con- 
tinue ftationary for an hour or two ,• after 
which it would begin to rife a little, but 
not 
