1would make proof of that, which about this Effect the diverſity of
gure worketh, its neceſſary to make the Experiment with Matter
wherein variety of Gravities hath no place. For making uſe of
ters which may be different in their Specifical Gravities, and meeting
with varieties of effects of Aſcending and Deſcending, we ſhall
wayes be left unſatisfied whether that diverſity derive it ſelf really
from the ſole Figure, or elſe from the divers Gravity alſo. We may
remedy this by takeing one only Matter, that is tractable and eaſily
reduceable into every ſort of Figure. Moreover, it wil be an excellent
expedient to take a kinde of Matter, exactly alike in Gravity unto the
Water: for that Matter, as far as pertaines to the Gravity, is
different either to Aſcend or Deſcend; ſo that we may preſently
ſerve any the leaſt difference that derives it ſelf from the diverſity of
Figure.
gure worketh, its neceſſary to make the Experiment with Matter
wherein variety of Gravities hath no place. For making uſe of
ters which may be different in their Specifical Gravities, and meeting
with varieties of effects of Aſcending and Deſcending, we ſhall
wayes be left unſatisfied whether that diverſity derive it ſelf really
from the ſole Figure, or elſe from the divers Gravity alſo. We may
remedy this by takeing one only Matter, that is tractable and eaſily
reduceable into every ſort of Figure. Moreover, it wil be an excellent
expedient to take a kinde of Matter, exactly alike in Gravity unto the
Water: for that Matter, as far as pertaines to the Gravity, is
different either to Aſcend or Deſcend; ſo that we may preſently
ſerve any the leaſt difference that derives it ſelf from the diverſity of
Figure.
Now to do this, Wax is moſt apt, which, beſides its incapacity of
receiveing any ſenſible alteration from its imbibing of Water, is
ile or pliant, and the ſame piece is eaſily reduceable into all Figures:
and being in ſpecie a very inconſiderable matter inferiour in Gravity
to the Water, by mixing therewith a little of the fileings of Lead it is
reduced to a Gravity exactly equall to that of the Water.
An
ment in Wax,
that proveth
gute to have no
Operation in
Natation &
merſion.
ment in Wax,
that proveth
gute to have no
Operation in
Natation &
merſion.
This Matter prepared, and, for example, a Ball being made
of as bigge as an Orange or biger, and that made ſo grave as to
ſink to the bottom, but ſo lightly, that takeing thence one only Grain
of Lead, it returnes to the top, and being added, it ſubmergeth to
the bottom, let the ſame Wax afterwards be made into a very broad
and thin Flake or Cake; and then, returning to make the ſame
periment, you ſhall ſee that it being put to the bottom, it ſhall, with the
Grain of Lead reſt below, and that Grain deducted, it ſhall aſcend to
the very Surface, and added again it ſhall dive to the bottom. And
this ſame effect ſhall happen alwaies in all ſort of Figures, as wel
gular as irregular: nor ſhall you ever finde any that will ſwim
out the removall of the Grain of Lead, or ſinke to the bottom unleſs
it be added: and, in ſhort, about the going or not going to the
tom, you ſhall diſcover no diverſity, although, indeed, you ſhall about
the quick and ſlow deſcent: for the more expatiated and diſtended
Figures move more ſlowly aſwel in the diveing to the bottom as in
the riſing to the top; and the other more contracted and compact
gures, more ſpeedily. Now I know not what may be expected from
the diverſity of Figures, if the moſt contrary to one another operate
not ſo much as doth a very ſmall Grain of Lead, added or removed.
of as bigge as an Orange or biger, and that made ſo grave as to
ſink to the bottom, but ſo lightly, that takeing thence one only Grain
of Lead, it returnes to the top, and being added, it ſubmergeth to
the bottom, let the ſame Wax afterwards be made into a very broad
and thin Flake or Cake; and then, returning to make the ſame
periment, you ſhall ſee that it being put to the bottom, it ſhall, with the
Grain of Lead reſt below, and that Grain deducted, it ſhall aſcend to
the very Surface, and added again it ſhall dive to the bottom. And
this ſame effect ſhall happen alwaies in all ſort of Figures, as wel
gular as irregular: nor ſhall you ever finde any that will ſwim
out the removall of the Grain of Lead, or ſinke to the bottom unleſs
it be added: and, in ſhort, about the going or not going to the
tom, you ſhall diſcover no diverſity, although, indeed, you ſhall about
the quick and ſlow deſcent: for the more expatiated and diſtended
Figures move more ſlowly aſwel in the diveing to the bottom as in
the riſing to the top; and the other more contracted and compact
gures, more ſpeedily. Now I know not what may be expected from
the diverſity of Figures, if the moſt contrary to one another operate
not ſo much as doth a very ſmall Grain of Lead, added or removed.
Me thinkes I hear ſome of the Adverſaries to raiſe a doubt upon
my produced Experiment. And firſt, that they offer to my
tion, that the Figure, as a Figure ſimply, and disjunct from the Matter
workes not any effect, but requires to be conjoyned with the
my produced Experiment. And firſt, that they offer to my
tion, that the Figure, as a Figure ſimply, and disjunct from the Matter
workes not any effect, but requires to be conjoyned with the