( *79 ) 
(bubblirtg up thro’ the Water in the VafTcl) whether 
ere(fl or inverted; cementedclofe on the Top-Sed^ion, 
or net, and whether the old Eyes in the Sides were ce- 
mented up, or left bare, the Bark it felf being pervious 
to Air; but then it took in lefs Air than when the old 
Eyes and upper Sed:ion were open. 
3. When Water (pour’d into a Cylindrick Glafs fix’d 
over the Receiver) cover’d that part of the Wood which 
was out of the Receiver, no Air came thro’ the Bottom; 
and when the Water was taken away from covering 
the upper part of the Wood, the Air did not come in 
thro’ the Bottom, till the Top of the Cylinder of 
Wood had its Bark well dried. 
4. He obferves with Dr. Grew, that the Mouths of 
the Air-Veflels are very vifible in the Leaves of Pines, 
and in the Trunks of feveral Plants, with a Microfeope; 
and in fome even without a Glafs. 
. y. In making Experiments upon young. Shoots, 
as their VefTels are full of Sap, he did not find that 
the Air pafs’d into or thro’ them ; (the Air in them 
being probably become fix’d) but it came in freely 
at the Roots applied to the Air-Pump in the fame , 
manner as in the Piece of Birch. 
O o 1 
CHAP. 
