Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
Text
Text Image
Image
XML
Thumbnail overview
Document information
None
Concordance
Figures
Thumbnails
Page concordance
<
1 - 30
31 - 60
61 - 90
91 - 120
121 - 150
151 - 180
181 - 210
211 - 240
241 - 270
271 - 300
301 - 330
331 - 360
361 - 390
391 - 420
421 - 450
451 - 480
481 - 510
511 - 540
541 - 570
571 - 600
601 - 630
631 - 660
661 - 690
691 - 701
>
Scan
Original
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
<
1 - 30
31 - 60
61 - 90
91 - 120
121 - 150
151 - 180
181 - 210
211 - 240
241 - 270
271 - 300
301 - 330
331 - 360
361 - 390
391 - 420
421 - 450
451 - 480
481 - 510
511 - 540
541 - 570
571 - 600
601 - 630
631 - 660
661 - 690
691 - 701
>
page
|<
<
of 701
>
>|
<
archimedes
>
<
text
>
<
body
>
<
chap
>
<
p
type
="
main
">
<
s
>
<
pb
xlink:href
="
040/01/438.jpg
"
pagenum
="
416
"/>
to all the Stars, as is this diurnal one: yet I believe that in few
<
lb
/>
dayes they perceived that the Moon was inconſtant in keeping
<
lb
/>
company with the other Stars; but yet withal, that many years
<
lb
/>
paſt, before that they diſtinguiſhed all the Planets: And in
<
lb
/>
ticular, I conceit that
<
emph
type
="
italics
"/>
Saturn
<
emph.end
type
="
italics
"/>
by its ſlowneſs, and
<
emph
type
="
italics
"/>
Mercury
<
emph.end
type
="
italics
"/>
by
<
lb
/>
<
arrow.to.target
n
="
marg808
"/>
<
lb
/>
ſon of its ſeldom appearing, were the laſt that were obſerved to
<
lb
/>
be wandring and errant. </
s
>
<
s
>It is to be thought that many more
<
lb
/>
years run out before the ſtations and retrogradations of the three
<
lb
/>
ſuperiour Planets were known, as alſo their approximations and
<
lb
/>
receſſions from the Earth, neceſſary occaſions of introducing the
<
lb
/>
Eccentrix and Epicicles, things unknown even to
<
emph
type
="
italics
"/>
Ariſtotle,
<
emph.end
type
="
italics
"/>
for
<
lb
/>
that he makes no mention thereof.
<
emph
type
="
italics
"/>
Mercury,
<
emph.end
type
="
italics
"/>
and
<
emph
type
="
italics
"/>
Venus,
<
emph.end
type
="
italics
"/>
with
<
lb
/>
their admirable apparitions; how long did they keep
<
lb
/>
mers in ſuſpence, before that they could reſolve (not to ſpeak of
<
lb
/>
any other of their qualities) upon their ſituation? </
s
>
<
s
>Inſomuch
<
lb
/>
that the very order onely of the Mundane bodies, and the
<
lb
/>
gral ſtructure of the parts of the Univerſe by us known, hath been
<
lb
/>
doubted of untill the time of
<
emph
type
="
italics
"/>
Copernicus,
<
emph.end
type
="
italics
"/>
who hath at laſt given
<
lb
/>
us notice of the true conſtitution, and real ſyſteme, according to
<
lb
/>
which thoſe parts are diſpoſed; ſo that at length we are certain
<
lb
/>
that
<
emph
type
="
italics
"/>
Mercury, Venus,
<
emph.end
type
="
italics
"/>
and the other Planets do revolve about
<
lb
/>
the Sun; and that the Moon revolveth about the Earth. </
s
>
<
s
>But
<
lb
/>
<
arrow.to.target
n
="
marg809
"/>
<
lb
/>
how each Planet governeth it ſelf in its particular revolution, and
<
lb
/>
how preciſely the ſtructure of its Orb is framed; which is that
<
lb
/>
which is vulgarly called the
<
emph
type
="
italics
"/>
Theory
<
emph.end
type
="
italics
"/>
of the
<
emph
type
="
italics
"/>
Planets,
<
emph.end
type
="
italics
"/>
we cannot as
<
lb
/>
yet undoubtedly reſolve.
<
emph
type
="
italics
"/>
Mars,
<
emph.end
type
="
italics
"/>
that hath ſo much puzled our
<
lb
/>
Modern Aſtronomers, is a proof of this: And to the Moon her
<
lb
/>
ſelf there have been aſſigned ſeveral Theories, after that the ſaid
<
lb
/>
<
emph
type
="
italics
"/>
Copernicus
<
emph.end
type
="
italics
"/>
had much altered it from that of
<
emph
type
="
italics
"/>
Ptolomy.
<
emph.end
type
="
italics
"/>
And to
<
lb
/>
deſcend to our particular caſe, that is to ſay, to the apparent
<
lb
/>
tion of the Sun and Moon; touching the former, there hath been
<
lb
/>
obſerved a certain great irregularity, whereby it paſſeth the two
<
lb
/>
<
arrow.to.target
n
="
marg810
"/>
<
lb
/>
ſemicircles of the Ecliptick, divided by the points of the
<
lb
/>
noxes in very different times; in paſſing one of which, it
<
lb
/>
eth about nine dayes more than in paſſing the other; a difference,
<
lb
/>
as you ſee, very great and notable. </
s
>
<
s
>But if in paſſing ſmall arches,
<
lb
/>
ſuch for example as are the twelve Signs, he maintain a moſt
<
lb
/>
gular motion, or elſe proceed with paces, one while a little more
<
lb
/>
ſwift, and another more ſlow, as it is neceſſary that it do, in caſe
<
lb
/>
the annual motion belong to the Sun onely in appearance, but
<
lb
/>
in reality to the Earth in company with the Moon, it is what hath
<
lb
/>
not hitherto been obſerved, nor it may be, ſought. </
s
>
<
s
>Touching
<
lb
/>
<
arrow.to.target
n
="
marg811
"/>
<
lb
/>
the Moon in the next place, whoſe reſtitutions have been
<
lb
/>
cipally lookt into an account of the Eclipſes, for which it is
<
lb
/>
ficient to have an exact knowledge of its motion about the Earth, </
s
>
</
p
>
</
chap
>
</
body
>
</
text
>
</
archimedes
>