( 2(54 ) 
Secondly, That the removal of this Imprifond Air 
could not be done without a Power furmounting its 
Kefiftance, which mufi: be great, fmec upon endeavour- 
ing to force Air thro’ the Body of Afhes by the Prengtli 
of my Breath, when the Tube was not above half fill’d, 
it provA unfuccefsful. Not but that I beMeve, if the fame 
lorce had been continu’d for fome time, it would have 
found its way through. 
TJiat the Water afeends fafi-eft at firfl, when there is 
a larger quantity of Interflitial Air to remove, (if I 
may call it fo,) than when the Column of the dry 
Afhes grows fliorter, by the higher Afcent of the Water 
in them. 
Fourthly, That notwithftanding.’the Tube was ram- 
med as full as it could with Afhes, yet their Interftices 
were fo many, as to receive, or imbibe another Body, 
equal in bulk to above half the Content of the whole. 
Fifthly, That the Water a rofe, not only in the Afhes 
ad joyningto the inward Surface of the Tube, but equal- 
ly in the whole Body of it, as I found upon Examina- 
tion. 
Sixthly, That the Air lodg’d in the Interftices of the 
Afhes, was protruded thro’ them as the Water afeend- 
cd, was manifeft by the Intumefcence of the Bladder : 
And notwithftanding the Accident of the Bladders fal- 
ling off, I cannot but conclude, that the Quantity of it 
muft be equal to the like bulk of Water which fupply- 
ed its place. 
I repeated the fame Experiment in Vacuo^ in a Tube 
much about the fame Diameter of the other, but not 
above i c Inches in length : This Tube, being fill’d with 
Afhes as before, was plac’d in Vacuo^^ where it remain’d 
fome time, to give liberty for the Air contain’d in them 
to get away. Then Plunging the lower end of the Tube 
under fome Water, I found (as I expeO:ed,j that the 
' Water arofe fafter in the Aflies in that Medium, than in 
Common 
