Vegetable Stattcks. py 
inch diameter at i: I filled the glafs tube 
with water, and immerfed the fmall end in 
the mercury x, which rofe but 4 inches, yet 
it imbibed water plentifully ; but the air if- 
fued too faft out of the branch at i, for the 
mercury to rife high. 
This, and many other experiments of 
this kind, convince me that branches of 
2, 3 , or 4 years old, are the beft adapted to 
draw the mercury higheft : The veffels of 
thofe that are older being too large and 
pervious to the air, which paffes moft free- 
ly thro’ the bark, efpecially at old eyes 5 as 
will be more fully proved in the fifth 
chapter. 
Experiment XXVI. 
July 30th at noon, a mixture of fun and 
clouds, the day and night before, 24 hours 
continual rain : I cut off a branch of a 
Golden pippin-tree b b, (Fig. 13.) about 3 feet 
long, with feveral large lateral branches; 
its diameter at the great end p near an inch, 
which end I cemented well, and tied over 
it a piece of wet bladder. 
Then I cut off at i the main top twig," 
where it was 4- inch diameter : I cemented 
the glafs tube z r, to the remaining branch 
