Galilei, Galileo, The systems of the world, 1661

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1Therefore, &c. The moſt proper and genuine anſwer to this
gation is contained in the Argument it ſelf; and even Aristotle
puts it in our mouths, which it is impoſſible, Simplicius, that you
ſhould not have ſeen.
The anſwer to
the ſecond
ment.
SIMPL. I neither have ſeen it, nor do I yet apprehend it.
SALV. This cannot be, ſure, the thing is ſo very plain.
SIMPL. I will with your leave, caſt an eye upon the Text.
SAGR. We will command the Text to be brought forthwith.
SIMPL. I alwayes carry it about with me: See here it is, and
I know the place perfectly well, which is in lib. 2. De Cælo, cap.
16. Here it is, Text 97. Preterea omnia, quæ feruntur latione
circulari ſubdeficere videntur, ac moveri pluribus una latione,
præter primam Sphæram; quare & Terram neceſſariam eſt, ſive
circa medium, ſive in medio poſita feratur, duabus moveri
lationibus.
Si autem hoc acciderit, neceſſariam eſt fieri
tiones, ac converſiones fixorum aſtrorum.
Hoc autem non
tur ficri, ſed ſemper eadem, apud eadem loca ipſius, &
tur, & occidunt. [In Engliſh thus:] Furthermore all that are

carried with circular motion, ſeem to ^{*} foreſlow, and to move
with more than one motion, except the firſt Sphere; wherefore
it is neceſſary that the Earth move with two motions, whether

it be carried about the ^{*} middle, or placed in the middle.
But
if it be ſo, there would of neceſſity be alterations and
ons made amongſt the fixed Stars.
But no ſuch thing is ſeen to
be done, but the ſame Star doth alwayes riſe and ſet in the ſame
place.
In all this I find not any falacy, and my thinks the
ment is very forcible.
* Subdeſicere.
* Or Centre.
SALV. And this new reading of the place hath confirmed me
in the fallacy of the Sillogiſme, and moreover, diſcovered
ther falſity.
Therefore obſerve. The Poſitions, or if you will,
Concluſions, which Ariſtotle endeavours to oppoſe, are two; one
is that of thoſe, who placing the Earth in the midſt of the World,
do make it move in it ſelf about its own centre.
The other is of
thoſe, who conſtituting it far from the middle, do make it
volve with a circular motion about the middle of the Univerſe.
And both theſe Poſitions he conjointly impugneth with one and
the ſame argument.
Now I affirm that he is out in both the one
and the other impugnation; and that his error againſt the firſt
Poſition is an Equivoke or Paralogiſme; and his miſtake

ing the ſecond is a falſe conſequence.
Let us begin with the firſt
Aſſertion, which conſtituteth the Earth in the midſt of the
World, and maketh it move in it ſelf about its own centre; and

let us confront it with the objection of Ariſtotle; ſaying, All
moveables, that move circularly, ſeem to ^{*} foreſlow, and move
with more than one Byas, except the firſt Sphere (that is the pri-

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