Vegetable Static ks . 157 
periflied, yet the air ftill continued to flow 
freely at x. 
It was obfervable in this, and many of 
the Experiments on flicks of other trees, 
that the air which could enter only thro" 
the bark between z and n , did not iflue in- 
to the water, at the bottom of the flick, 
only at or near the bark, but through the 
whole and inmoft fubftance of the wood, 
and that chiefly, as I guefs, by the largenefs 
of the bafes of the hemifpheres of air thro 9 
the largcft veflcls of the wood $ which ob- 
fervation corroborates Dr. Grews and Mal- 
pighis opinion, that they arc air veflels. 
I then cemented upon the receiver the 
cylindrical glafs y y , and filled it full of wa- 
ter, fo as to ftand an inch above the top n 
of the flick. 
The air ftill continued to flow at x, but 
in an hour’s time it very much abated, and 
in two hours ceafed quite $ there being 
now no paffage for frefh air to enter, and 
fupply what was drawn out of the flick. 
I then with a glafs crane drew off the 
water out of the cylinder/ y 9 yet the air 
did not iflue thro* the wood at x . 
I therefore took the receiver with the 
flick in it, and held it near the fire, till the 
.z. bark 
