157145That the Moon may be a World.
high, they can keep themſelves up, and ſoar a-
bout by the meer extenſion of their Wings.
Now the Reaſon of this difference, is not (as
ſome falſly conceive) the depth of the Air un-
der them. For a Bird is not heavier when
there is but a foot of Air under him, than when
there is a Furlong. As appears by a Ship in
the Water, (an inſtance of the ſame nature)
which does not ſink deeper, and ſo conſequent-
ly is not heavier, when it has but five Fathom
depth, than when it has Fifty. But the true
reaſon is, the weakneſs of the deſire of Uni-
on in Denſe Bodies at a diſtance.
bout by the meer extenſion of their Wings.
Now the Reaſon of this difference, is not (as
ſome falſly conceive) the depth of the Air un-
der them. For a Bird is not heavier when
there is but a foot of Air under him, than when
there is a Furlong. As appears by a Ship in
the Water, (an inſtance of the ſame nature)
which does not ſink deeper, and ſo conſequent-
ly is not heavier, when it has but five Fathom
depth, than when it has Fifty. But the true
reaſon is, the weakneſs of the deſire of Uni-
on in Denſe Bodies at a diſtance.
So that from hence, there might be juſt oc-
caſion to Tax Ariſtotle and his Followers, for
Teaching, that heavineſs is an abſolute quality
of it ſelf, and really diſtinct from condenſity:
whereas ’tis only a Modification of it, or ra-
ther, another Name given to a condenſed Bo-
dy, in reference to its Motion.
caſion to Tax Ariſtotle and his Followers, for
Teaching, that heavineſs is an abſolute quality
of it ſelf, and really diſtinct from condenſity:
whereas ’tis only a Modification of it, or ra-
ther, another Name given to a condenſed Bo-
dy, in reference to its Motion.
For if it were abſolute, then it ſhould al-
ways be inherent in its Subject, and not have
its Eſſence depend upon the Bodies being here
or there. But it is not ſo. For,
ways be inherent in its Subject, and not have
its Eſſence depend upon the Bodies being here
or there. But it is not ſo. For,
1.
Nothing is heavy in its proper place, ac-
cording to his own principle, Nibil grave eſt
in ſuo loco. And then,
cording to his own principle, Nibil grave eſt
in ſuo loco. And then,