1 14 Vegetable StaUcki, 
thro' old bark : And in different kinds of 
trees it has very different degrees of more 
or lefs free entrance. 
I repeated the fame Experiment upon fe- 
veral roots of trees : The air paffed moft 
freely from nx.o and when the glafs vef- 
fel/7 was full of water, and there was no 
water in a;, the water paffed at the rate of 
3 ounces in 5 minutes 5 when the upper 
end n was cemented up, and no water in y 
fome air, tho* not in great plenty, would 
enter the bark at 4s/, and pafs thro’ the wa- 
ter at X, 
And that there is fome air both in an 
elaftick and unelaftick ftate, mix'd with the 
earth, ( which may well enter the roots with 
the nourifhment) I found by putting into 
the inverted glafs z, a a full of water 
(Fig. 35.) fome earth dug up in an alley in 
the garden, which after it had flood foak- 
ing for fevcral days, yielded a little elaftick 
air, tho* the earth was not half diffolved. 
And in Experiment 68. we find that a cu- 
bick inch of earth yielded 43 cubick in- 
ches of air by diftillation, a good part of 
which was roufed by the adion of the fire 
from a fix'd to an elaftick ftate. 
f 
1 fixed 
