t' ( io8y ) 
fappofition of which two Particulars that Geutlemaiv*s 
Solution was founded. 
This Expaiment may be thus accounted for. The 
Cylinder of Water F G B C, by its weight balances a 
part of the prefTurc of the Atmofphere, which is in- 
cumbent on the Water in the Ciftern, and endeavours 
to force that Cylinder upwards. The reft of that 
preflure is balanced by the Spring of the Air, A F G, 
which is included between the Cylinder of Water 
F G B C, and the little Column of Water in the Ca- 
pillary A. But, as this Air by its Spring preffes e- 
qually every way, it muft balance as much of the 
preflure of the Atmofphere upon the little Column of 
Water at A, as it does of that upon the Water in the 
Ciftern. The remainder of the prefture of the Atmo- 
fphere upon the Column of Water at A is fuftain’d by 
the force with which that Column adheres to the 
Capillary Tube, which therefore does exadly balance 
the weight of the Cylinder of Water F G B C, and 
is the real, though not the immediate, caufe of its Suf* 
peniion. 
- The experiment fuccecds in, the fame manner when 
a Column of Quickfilver is railed into the Funnel, in- 
ftead of the Column of Water F G B C, the top of the 
Tube being touch’d with a wet Finger as before. But 
then the height of the Quickfilver in the Funnel muft 
be as much lefs than that of the Water, as irs Spect- 
fick Gravity is greater. 
1 proceed now to acquit my felf of a Promife I 
made in the Difeourfe abovemention’d, of examining 
whether the Experiments therein contain’d would fuc- 
ceed in Vacuo \ and whether Water could be fufpend- 
ed in a wide Tube by means of a Capillary at Top, 
at a greater height, than what it can be rais’d to by 
the Prefture of the Atmofphere. 
10 E 1 
In 
