l/c get able St a ticks. 145 
flicks, 1 1 da Fig. 28, 29. the bark fwcllcd 
more at the upper part of the disbarked 
places than at the lower, viz. becaufe thefe 
lower parts were thereby deprived of the 
plenty of nourilhment which was brought 
to the upper parts of thofe difabled placer?, 
by the ftrong attradion of the leaves on 
the Buds 7, of which we have a fur- 
ther confirmation in the ringlet of bark 
N°. 1 3. Fig. 29. which ringlet did not fwell 
or grow at cither end, being not only de- 
prived of theatrradion of the fuperior leaves, 
by the bared placed N". 12. but alfo with- 
out any leaf Bud of its own, w^hofe branch- 
ing fap Veffels, being like thofe of other leaf 
Buds rooted downwards in the wood, might 
thence draw fap, for the nourifhment of its 
felfand the adjoining bark N®. 13. But had 
thefe rooting fap veffels run upwards, in- 
ftead of downwards, kis probable, that in 
that cafe the upper part of each ringlet of 
bark, and not the lower, would have fwelled, 
by having nourifhment thereby brought to 
it from the inmoft wood. 
We may hence alfo fee the reafon why^’ 
when a tree is unfruitful, it is brought to 
bear fruit, fay the taking ringlets of bark off 
L from 
