The Anatomy 
or fo many more Veféls, ismoft probable : There only wantcth a great- 
er perfection of Microfcopes to determine, 
16. $. The Contents of the Pith are, fometimes Liquor, and fome- 
times a Vaporons-Aer. The Liquor is always Diaphanous, as that of the 
Parenchymous Part of the Barque; and in nature, not much differing 
from it. The Aer is fometimes lefs, and fometimes more Vaporous, than 
that of the Barque. By this Aer I mean, that which is contained in the 
Bladders. Within the Concaves of the Fibres which compote the glad- 
ders, I fuppofe, there is another different Sort of Aer. So that as in 
the Bladders is contained amore Aqueous; and in the Vefels, a more 
Effential Liquor : So fometimes, in the fame Bladders, is contained a 
more Vaporous 5 and inthe Fibres, a more Simple and Efféntial Aer. 
