148 Vegetable Staiich. 
Another argument, againft a uniform cir- 
culation of the fap in trees as in animals, 
may be drawn from Exper. 37. where it 
was found by the three mercurial gages 
fix’d to the fame Vine, that while fome of 
its branches changed their ftate of protrud- 
ing fap into a ftate of imbibing, others con- 
tinued protruding fap, one nine, and the 
other thirteen days longer. 
In the fecond Vol. of Mr. Lowthorp’ s 
Abridgment of the ‘Philof TranfaEl. p. 708. 
is recited an Experiment of Mr. Brother- 
ton’s , viz. A young Hazel n (Fig. 27.) was 
cut into the body at x z with a deep gafli; 
the parts of the body below at z, and a- 
bove at x, were cleft upwards and down- 
wards, and the fplinters x z by wedges were 
kept off from touching each other, or the 
reft of the body. The following year, the 
upper fplintcr x was grown very much, but 
the lower fplinter z did not grow, but the 
reft of the body grew, as if there had been 
no gafti made : I have not yet fucceeded in 
making this Experiment, the wind having 
broken at x z all the trees I prepared for 
it : But if there was a Bud at x which Ihot 
out leaves, and none at z, then by Experi- 
ment 41, 'tis plain that thofe leaves might 
draw 
