The Authors
confutation of
the Peripateticks
Cauſes of
tion &
on.
confutation of
the Peripateticks
Cauſes of
tion &
on.
Water & other
fluids void of
Reſiſtance
gainſt Diviſion.
fluids void of
Reſiſtance
gainſt Diviſion.
The
nancy of
ments in
ables to be
ſidered only in
relation to their
excefs or defect
of Gravity in
reference to the
Medium.
nancy of
ments in
ables to be
ſidered only in
relation to their
excefs or defect
of Gravity in
reference to the
Medium.
The
ate Cauſe of
tation is that the
Moveable is leſs
grave than the
Water.
ate Cauſe of
tation is that the
Moveable is leſs
grave than the
Water.
The P
ticks alledge for
the reaſon of
Natation the
Cauſe of the
Cauſe.
ticks alledge for
the reaſon of
Natation the
Cauſe of the
Cauſe.
Gravity a
Cauſe moſt
ſpicuous to
ſence:
Cauſe moſt
ſpicuous to
ſence:
Let us not then deſpiſe thoſe Hints, though very dark, which
Reaſon, after ſome contemplation, offereth to our Intelligence,
lets be content to be taught by Archimedes, that then any Body
ſubmerge in water, when it ſhall be ſpecifically more grave than it
and that if it ſhall be leſs grave, it ſhall of neceſſity ſwim, and
that it will reſt indifferently in any place under water, if its
be perfectly like to that of the
Reaſon, after ſome contemplation, offereth to our Intelligence,
lets be content to be taught by Archimedes, that then any Body
ſubmerge in water, when it ſhall be ſpecifically more grave than it
and that if it ſhall be leſs grave, it ſhall of neceſſity ſwim, and
that it will reſt indifferently in any place under water, if its
be perfectly like to that of the
Lib 1. of
tation Prop. 7.
tation Prop. 7.
Id. Lib. 1.
Prop. 4.
Prop. 4.
Id. Lib. 1:
Prop. 3.
Prop. 3.
Theſe things explained and proved, I come to conſider that which
offers it ſelf, touching what the Diverſity of figure given unto the
ſaid Moveable hath to do with theſe Motions and Reſts; and
ceed to affirme, that,
offers it ſelf, touching what the Diverſity of figure given unto the
ſaid Moveable hath to do with theſe Motions and Reſts; and
ceed to affirme, that,
THEOREME V.
The diverſity of Figures given to this or that Solid
cannot any way be a Cauſe of its abſolute Sinking
Swimming.
Diverſity of
Figure no Cauſe
of its abſolute
Natation or
merſion.
Figure no Cauſe
of its abſolute
Natation or
merſion.
So that if a Solid being formed, for example, into a Spherical
Figure, doth ſink or ſwim in the water, I ſay, that being formed
into any other Figure, the ſame figure in the ſame water,
ſink or ſwim: nor can ſuch its Motion by the Expanſion or by
ther mutation of Figure, be impeded or taken
Figure, doth ſink or ſwim in the water, I ſay, that being formed
into any other Figure, the ſame figure in the ſame water,
ſink or ſwim: nor can ſuch its Motion by the Expanſion or by
ther mutation of Figure, be impeded or taken
The
on of Figure,
tards the
ty of the aſcent
or deſcent of the
Moveable in the
water; but doth
not deprive it of
all Motion.
on of Figure,
tards the
ty of the aſcent
or deſcent of the
Moveable in the
water; but doth
not deprive it of
all Motion.
The Expanſion of the Figure may indeed retard its Velocity,
well of aſcent as deſcent, and more and more according as the ſaid
gure is reduced to a greater breadth and thinneſs: but that it may bere
duced to ſuch a form as that that ſame matter be wholly hindred from
moving in the ſame water, that I hold to be impoſſible. In this I have
met with great contradictors, who producing ſome Experiments, and
in perticular a thin Board of Ebony, and a Ball of the ſame Wood
and ſhewing how the Ball in Water deſcended to the bottom, and
the Board being put lightly upon the Water ſubmerged not, but
ed; have held, and with the Authority of Ariſtotle, confirmed them
ſelves in their Opinions, that the Cauſe of that Reſt was the
of the Figure, u able by its ſmall weight to pierce and penetrate the
Reſiſtance of the Waters Craſſitude, which Reſiſtance is readily
vercome by the other Sphericall Figure.
well of aſcent as deſcent, and more and more according as the ſaid
gure is reduced to a greater breadth and thinneſs: but that it may bere
duced to ſuch a form as that that ſame matter be wholly hindred from
moving in the ſame water, that I hold to be impoſſible. In this I have
met with great contradictors, who producing ſome Experiments, and
in perticular a thin Board of Ebony, and a Ball of the ſame Wood
and ſhewing how the Ball in Water deſcended to the bottom, and
the Board being put lightly upon the Water ſubmerged not, but
ed; have held, and with the Authority of Ariſtotle, confirmed them
ſelves in their Opinions, that the Cauſe of that Reſt was the
of the Figure, u able by its ſmall weight to pierce and penetrate the
Reſiſtance of the Waters Craſſitude, which Reſiſtance is readily
vercome by the other Sphericall Figure.
This is the Principal point in the preſent Queſtion, in which I
ſwade my ſelf to be on the right ſide.
ſwade my ſelf to be on the right ſide.
Therefore, beginning to inveſtigate with the examination of
quiſite Experiments that really the Figure doth not a jot alter the
cent or Aſcent of the ſame Solids, and having already
ted that the greater or leſs Gravity of the Solid in relation to the
vity of the Medium is the cauſe of Deſcent or Aſcent: when ever we
quiſite Experiments that really the Figure doth not a jot alter the
cent or Aſcent of the ſame Solids, and having already
ted that the greater or leſs Gravity of the Solid in relation to the
vity of the Medium is the cauſe of Deſcent or Aſcent: when ever we