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

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1
SALV. I would anſwer for my ſelf in general terms, that if
it were appointed by the will of God, that the Earth ſhould ceaſe
from its diurnal revolution, thoſe birds would do what ever ſhould
pleaſe the ſame Divine will.
But if this Author deſire a more
particular anſwer, I ſhould tell him, that they would do quite
trary to what they do now, if whilſt they, being ſeparated from
the Earth, do bear themſelves up in the air, the Terreſtrial Globe
by the will of God, ſhould all on a ſudden be put upon a
tate motion; it concerneth this Author now to aſcertain us what
would in this caſe ſucceed.
SAGR. I pray you, Salviatus, at my requeſt to grant to this
Author, that the Earth ſtanding ſtill by the will of God, the other
things, ſeparated from it, would continue to turn round of their
own natural motion, and let us hear what impoſſibilities or
veniences would follow: for I, as to my own particular, do not
ſee how there can be greater diſorders, than theſe produced by the
Author himſelf, that is, that Larks, though they ſhould flie, could
not be able to hover over their neſts, nor Crows over ſnails, or
rocks: from whence would follow, that Crows muſt ſuffer for
want of ſnails, and young Larks muſt die of hunger, and cold, not
being able to be fed or ſheltered by the wings of the old ones.
This is all the ruine that I can conceive would follow, ſuppoſing
the Authors ſpeech to be true.
Do you ſee, Simplicius, if
ter inconveniences would happen?
SIMP. I know not how to diſcover greater; but it is very
dible, that the Author beſides theſe, diſcovered other diſorders in
Nature, which perhaps in reverend reſpect of her, he was not
ing to inſtance in.
Therefore let us proceed to the third
ction. Inſuper quî fit, ut istæ res tam variæ tantùm moveantur
ab Occaſu in Ortum, parallelæ ad Æquatorem?
ut ſemper
tur, nunquam quieſcant? [which ſpeaks to this ſenſe:] Moreover,
how comes it to paſs that theſe things, ſo diverſe, are onely moved
from the Weſt towards the Eaſt, parallel to the Æquinoctial?
that they always move, and never reſt?
SALV. They move from Weſt to Eaſt parallel to the
noctial without ceaſing, in the ſame manner as you believe the
fixed ſtars to move from Eaſt to Weſt, parallel to the
al, without ever reſting.
SIMP. Quarè, quò ſunt altiores, celeriùs; quò humiliores,
diùs? (i.
e.) Why are the higher the ſwifter, and the lower the
ſlower?
SALV. Becauſe that in a Sphere or circle, that turns about
on its own centre, the remoter parts deſcribe greater circuits, and
the parts nearer at hand deſcribe leſſer in the ſame time.
SIMP. Quare, quæ Æquinoctiali propriores, in majori; quæ

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