Boyle, Robert, New experiments physico-mechanicall, touching the spring of the air and its effects, 1660

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1little by little; and conſequently, in divers
ſuch parcels as were able to conſtitute
bubbles, each of them big enough to
raiſe the Viol and keep it aloft until the
avolation of that bubble.
Whereby it
may appear, that the grand rule in Hy­
droſtaticks, That a Body will ſwim in the
Water, in caſe it be lighter then as much
of that Water that equals it in bulk, will
hold likewiſe when the preſſure of the At­
moſphere is in very great meaſure, if not
when it is totally taken off from the Li­
quor and the Body: though it were worth
inquiring what it is that ſo plentifully
concurs to fill the bubbles made in our
Experiment by the ſo much expanded
Air, for to ſay with the old Peripatetick
Schools, That the Air, in Rarefaction,
may acquire a new extent, without the
admiſſion of any new ſubſtance, would
be an account of the Phænomenon very
much out of date, and which, I ſuppoſe,
our Modern Naturaliſts would neither
give, nor acquieſs in.
I know not whether it may be requiſite
to adde, that in this Experiment, as in
the former, the outward Air being let in
did ſoon precipitate the floating Viol.
But
I think it will not be amiſs to note, that

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