Salusbury, Thomas, Mathematical collections and translations (Tome I), 1667

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1diſſenteth from the doctrine of Ariſtotle and Ptolomy. As again,

to this third motion, which the Author aſſignes to the Terreſtrial
Globe, as the judgment of Copernicus, I know not which he would
mean thereby: it is not that queſtionleſſe, which Copernicus
cribes unto it conjunctly with the other two, annual and diurnal,
which hath nothing to do with declining towards the South and
North; but onely ſerveth to keep the axis of the diurnal
on continually parallel to it ſelf; ſo that it muſt be confeſt, that
either the Authour did not underſtand this, or that elſe he
bled it.
But although this great miſtake ſufficeth to free us from
any obligation of a farther enquiry into his objections; yet
vertheleſſe I ſhall have them in eſteem; as indeed they deſerve to
be valued much before the many others of impertinent
niſts.
Returning therefore to his objection, I ſay, that the two
motions, annual and diurnal, are not in the leaſt contrary, nay are
towards the ſame way, and therefore may depend on one and the
ſame principle.
The third is of it ſelf, and voluntarily ſo
tial to the annual, that we need not trouble our ſelves (as I ſhall
ſhew in its place) to ſtudy for principles either internal or external,
from which, as from its cauſe, to make it produced.
By another
error it is ſeen that
the Antagoniſt had
but little ſtudied
Copernicus.
It is queſtioned,
whether the
nent underſtood
the third motion
aſſigned to the
Earth by
cus.
SAGR. I ſhall alſo, as being induced thereto by natural reaſon,
ſay ſomething to this Antagoniſt.
He will condemn Copernicus,
unleſſe I be able to anſwer him to all objections, and to ſatisfie
him in all queſtions he ſhall ask; as if my ignorance were a
ſary argument of the falſhood of his Doctrine.
But if this way of
condemning Writers be in his judgment legal, he ought not to
think it unreaſonable, if I ſhould not approve of Arîſtotle and
lomy, when he cannot reſolve, better than my ſelf, thoſe doubts
which I propound to him, touching their Doctrine.
He asketh me,
what are the principles by which the Terreſtrial Globe is moved

with the Annual motion through the Zodiack, and with the
nal through the Equinoctial about its own axis.
I anſwer, that
they are like to thoſe by which Saturn is moved about the
ack in thirty years, and about its own centre in a much ſhorter
time along the Equinoctial, as the collateral apparition and
cultation of its Globes doth evince.
They are principles like to
thoſe, whereby he ſcrupleth not to grant, that the Sun runneth
row the Ecliptick in a year, and revolveth about its own centre
parallel to the Equinoctial in leſſe than a moneth, as its ſpots doth
ſenſibly demonſtrate.
They are things like to thoſe whereby the
Medicean Stars run through the Zodiack in twelve years, and
all the while revolve in ſmall circles, and ſhort periods of time
bout Jupiter.
The ſame
ment anſwered by
examples of the
like motions in
ther cœleſtial
dies.
SIMP. This Author will deny all theſe things, as deluſions of
the fight, cauſed by the cryſtals of the Teleſcope.

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