( 241 J ) 
rifing for fome time, till it had reach’d near t 6 Inches ■ 
which plainly Ihews, that the Springs of Air, by being 
fomewhat over bent, do not prefently (altho at Liberty) 
recover their Priftine $tate. And were they to fuffer a 
more violent compreffdre, and to remain for a Week, 
Month, or a Year, in the fame State, I doubt not but 
according to the length of time, and degrees of Con- 
denfation, a proportional time would be requir’d to re- 
cover them to their Natural State again. But what is 
the Force made ufe of in this Experiment, in compari- 
fon to that of Fir’d Gunpowder, where the fuddennefs, 
and violentnefs of the Impulfe, is unaccountable ; how- 
ever, it ferves well to confirm the Suggeftion I had, that 
Air might fo fuft’er in its Parts by Force or an Unnatu- 
ral Extention of them, as to require time to recover 
their Priftine Natural State. 
Upon a Repetition of the fame Experiment, only the 
Condenfed Air remained in the lame ftate, as at firft in- 
jefted, for about 1 8 Hours .- then letting out the Air as 
before, the Pre.m£ntion’d Box with its Tube was fcrew’d 
on ; and upon Obfervation I found, that as the Springs of 
the Air did unbend themfelves, fo they prefs’d more 
and more on the Surface of the included Water, which 
rais’d it higher and higher in the Tube, as they ap- 
proach’d nearer their Natural State. This continued 
for about 6 Hours, at which time the little Tube was ac- 
cidentally broke, and our farther Obfervations for that 
time fruftrated. 
IY. Part 
