? 2(Jp ) 
IV. An Account of fome Experiments^ in relation to 
the Weight of Common Water ^ under dijferent Cir^ 
curnfances. By Mr, Fr. Hauksbee. F, 5. 
F lrfl:, I took a Glafs of Common Water, and having 
weigh’d nicely a Glafs-Bottle in it, whofe Bulk was 
equal to the Bulk of 575 Grains of the fame Fluid, then 
I caus’d fome of the fame Water to be boyhd over the 
Fire ; and after that, it was included in Facuo, and there 
remain’d till it became of the fame Temperature (as to 
coldnefs) with Common Water. Thus, to the utmoft 
of my Power, I endeavour’d to Extricate all the Ah* out 
of the Water, thinking in that State, it would become 
more denfe than when I weigh’d my Bottle firfHn’t j but 
contrary to my Expedation, I found that the Bottle had 
juft the fame weight in it as before *, which feems to con- 
firm the impoffibility to comprefs Water by force intoa 
lefTer Ipaee than it naturally poffelTes: For if upon the 
Removal of fuch a Qiiantity of Air from out of its Bo- 
dy, the Parts do not Aide any clofer together, how 
fhould a Weight laid upon its Surface, when its Inter- 
flices feem to berepleat with Air, make any ImprefTi- 
on on it ? The Body which is forc’d out of the Water, 
by the premention’d means, I call Air, fince for any 
thing to the contrary that I can difeover, it is fubjed to 
all the fame Laws with it ^ but that the Water, upon its 
abfence, fhould not unite more clofely chan before, 
feems very furprifing to me ; for I cannot conceive 
what Matter muff fupply the Vacancies, fince the Par- 
ticles bf Water themfelves remain at the fanie diftances 
as if the Air was not withdrawn, otherwife the Water 
Q. q ‘ of 
