SUPPOSITIONS.

Any Grave Body, (as to what belongeth to it's proper ver

tue) moveth downwards, ſo that the Center of it's Gravity

never ſtrayeth out of that Right Line which is produced

from the ſaid Center placed in the firſt Term of the Motion unto

the univerſal Center of Grave Bodies. Which is a Suppoſition

very manifeſt, becauſe that ſingle Center being obliged to endea

vour to unite with the common Center, it's neceſſary, unleſſe ſome

impediment intervene, that it go ſeeking it by the ſhorteſt Line,

which is the Right alone: And from hence may we ſecondarily

ſuppoſe

tue) moveth downwards, ſo that the Center of it's Gravity

never ſtrayeth out of that Right Line which is produced

from the ſaid Center placed in the firſt Term of the Motion unto

the univerſal Center of Grave Bodies. Which is a Suppoſition

very manifeſt, becauſe that ſingle Center being obliged to endea

vour to unite with the common Center, it's neceſſary, unleſſe ſome

impediment intervene, that it go ſeeking it by the ſhorteſt Line,

which is the Right alone: And from hence may we ſecondarily

ſuppoſe

Every Grave Body putteth the greateſt ſtreſſe, and weigheth

moſt on the Center of it's Gravity, and to it, as to its proper ſeat,

all Impetus, all Ponderoſity, and, in ſome, all Moment hath re

courſe.

moſt on the Center of it's Gravity, and to it, as to its proper ſeat,

all Impetus, all Ponderoſity, and, in ſome, all Moment hath re

courſe.

We laſtly ſuppoſe the Center of the Gravity of two Bodies e

qually Grave to be in the midſt of that Right Line which conjoyns

the ſaid two Centers; or that two equall weights, ſuſpended in

equall diſtence, ſhall have the point of Equilibrium in the common

Center, or meeting of thoſe equal Diſtances. As for Example,

the Diſtance C E being equall to the Diſtance E D, and there be

ing by them two equall weights ſuſpended, A and B, we ſuppoſe

the point of Equilibrium to be in the point E, there being no

greater reaſon for inclining to

one, then to the other part. But

180[Figure 180]

here is to be noted, that the Di

ſtances ought to be meaſured

with Perpendicular Lines, which

from the point of Suſpenſion E,

fall on the Right Lines, that from

the Center of the Gravity of the

Weights A and B, are drawn to

the common Center of things

Grave; and therefore if the Diſtance E D were tranſported into

E F, the weight B would not counterpoiſe the weight A, becauſe

drawing from the Centers of Gravity two Right Lines to the Cen

ter of the Earth, we ſhall ſee that which cometh from the Center

of the Weight I, to be nearer to the Center E, then the other

produced from the Center of the weight A. Therefore our ſaying

that equal Weights are ſuſpended by [or at] equal Diſtances, is

to be underſtood to be meant when as the Right Lines that go from

their Centers & to ſeek out the common Center of Gravity, ſhall be

equidiſta nt from that Right Line, which is produced from the ſaid

qually Grave to be in the midſt of that Right Line which conjoyns

the ſaid two Centers; or that two equall weights, ſuſpended in

equall diſtence, ſhall have the point of Equilibrium in the common

Center, or meeting of thoſe equal Diſtances. As for Example,

the Diſtance C E being equall to the Diſtance E D, and there be

ing by them two equall weights ſuſpended, A and B, we ſuppoſe

the point of Equilibrium to be in the point E, there being no

greater reaſon for inclining to

one, then to the other part. But

180[Figure 180]

here is to be noted, that the Di

ſtances ought to be meaſured

with Perpendicular Lines, which

from the point of Suſpenſion E,

fall on the Right Lines, that from

the Center of the Gravity of the

Weights A and B, are drawn to

the common Center of things

Grave; and therefore if the Diſtance E D were tranſported into

E F, the weight B would not counterpoiſe the weight A, becauſe

drawing from the Centers of Gravity two Right Lines to the Cen

ter of the Earth, we ſhall ſee that which cometh from the Center

of the Weight I, to be nearer to the Center E, then the other

produced from the Center of the weight A. Therefore our ſaying

that equal Weights are ſuſpended by [or at] equal Diſtances, is

to be underſtood to be meant when as the Right Lines that go from

their Centers & to ſeek out the common Center of Gravity, ſhall be

equidiſta nt from that Right Line, which is produced from the ſaid