ij8 Vegetable Staticks. 
bark was well dried ; after which I fet it 
upon the air pump, and exhaufted the air, 
upon which the air iffued as freely at x as 
it did before the bark had been wetted, and 
continued fo to do, tho’ I kept the receiver 
exhaufted for many hours. 
I fixed in the fame manner as the pre- 
ceding Birch flick, three joints of a Vine- 
branch, which was two years old, the up- 
permoft knot r being within the receiver; 
when I pumped, the air paffed mod freely 
into the water x x. 
I cemented faft the upper end of the flick n 
and then pumped, the air ftill iffued out at at, 
tho’ I pumped very long, but there did not 
now pafs the twentieth part of the air which 
paffed when the end n was not cemented. 
I then inverted the flick, placing n fix 
inches deep in the water, and covered all the 
bark from the furface of the water to z 
the top of the receiver with cement •, then 
pumping the air which entered at the top 
of the flick, paffed thro’ the immerfed part 
of the bark : When I ceafed pumping for 
fome time, and the air had ceafed iffuing 
out 5 upon my repeating the pumping it 
would again iffue out. 
I found 
