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The Anatomy Book II. 

or fo many more Vefféls, ismoft probable : There only wanteth a great- 
er perfection of Microfcopes to determine, 
16. §. The Contents of the Pith are, fometimes Liquor, and fome- 
times a Vaporous-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 lef, and fometimes more Vaporows, than 
that of the Bargue. By this Aer Imean, that which is contained in the 
Bladders. Within the Concaves of the Fibres which compofe the Blad- 
ders, 1 fappofe, there is another different Sort of Aer. So that as in 
the Bladders is contained amore Aqueous; and in the Vefféls, a more 
Effential Liquor : So fometimes, in the fame’ Bladders, is contained a 
more Vaporows 3 and inthe Fibres, a more Simple and E/fential Aer. 


