Galilei, Galileo
,
The systems of the world
,
1661
Text
Text Image
Image
XML
Thumbnail overview
Document information
None
Concordance
Figures
Thumbnails
Table of figures
<
1 - 30
31 - 33
[out of range]
>
<
1 - 30
31 - 33
[out of range]
>
page
|<
<
of 948
>
>|
<
archimedes
>
<
text
>
<
body
>
<
chap
>
<
p
type
="
main
">
<
s
>
<
pb
xlink:href
="
065/01/370.jpg
"
pagenum
="
360
"/>
circle that is the Terminator of the light; therefore this ſame
<
lb
/>
circle ſhall paſſe by the Poles A B in the fourth figure, and
<
lb
/>
in its plain the Axis A B ſhall fall, but the greateſt circle paſſing
<
lb
/>
by the Poles of the Parallels, divideth them all in equal parts;
<
lb
/>
therefore the arches I K, E F, C D, G N, L M, ſhall be all
<
lb
/>
ſemicircles, and the illumin'd Hemiſphere ſhall be this which
<
lb
/>
looketh towards us, and the Sun, and the Terminator of the
<
lb
/>
light ſhall be one and the ſame circle A C B D, and the Earth
<
lb
/>
being in this place ſhall make it Equinoctial to all its Inhabitants.
<
lb
/>
</
s
>
<
s
>And the ſame happeneth in the ſecond figure, where the Earth
<
lb
/>
having its illuminated Hemiſphere towards the Sun, ſheweth us
<
lb
/>
the other that is obſcure, with its nocturnal arches, which in
<
lb
/>
like manner are all ſemicircles, and conſequently, here alſo it
<
lb
/>
maketh the Equinoctial. </
s
>
<
s
>And laſtly in regard that the line
<
lb
/>
duced from the centre of the Sun to the centre of the Earth, is
<
lb
/>
perpendicular to the Axis A B, to which the greateſt circle of
<
lb
/>
the parallels C D, is likewiſe erect, the ſaid line O
<
emph
type
="
italics
"/>
Libra
<
emph.end
type
="
italics
"/>
ſhall
<
lb
/>
paſſe of neceſſity by the ſame Plain of the parallel C D, cutting
<
lb
/>
its circumference in the midſt of the diurnal arch C D; and
<
lb
/>
therefore the Snn ſhall be vertical to any one that ſhall ſtand
<
lb
/>
where that interſection is made; but all the Inhabitants of that
<
lb
/>
Parallel ſhall paſſe the ſame, as being carried about by the
<
lb
/>
Earths diurnal converſion; therefore all theſ upon that day
<
lb
/>
ſhall have the Meridian Sun in their vertex. </
s
>
<
s
>And the Sun at the
<
lb
/>
ſame time to all the Inhabitants of the Earth ſhall ſeem to
<
lb
/>
ſcribe the Grand Parallel called the Equinoctial. </
s
>
<
s
>Furthermore,
<
lb
/>
foraſmuch as the Earth being in both the Solſtitial points of the
<
lb
/>
Polar circles I K and L M, the one is wholly in the light, and
<
lb
/>
the other wholly in the dark; but when the Earth is in the
<
lb
/>
noctial points, the halves of thoſe ſame polar circles are in the
<
lb
/>
light, the remainder of them being in the dark; it ſhould not
<
lb
/>
be hard to underſtand, how that the Earth
<
emph
type
="
italics
"/>
v. </
s
>
<
s
>gr.
<
emph.end
type
="
italics
"/>
from
<
emph
type
="
italics
"/>
Cancer
<
emph.end
type
="
italics
"/>
<
lb
/>
(where the parallel I K is wholly in the dark) to
<
emph
type
="
italics
"/>
Leo,
<
emph.end
type
="
italics
"/>
one part of
<
lb
/>
the parallel towards the point I, beginneth to enter into the light,
<
lb
/>
and that the Terminator of the light I M beginneth to retreat
<
lb
/>
wards the Pole AB, interſecting the circle ACBD nolonger in IM,
<
lb
/>
but in two other points falling between the terms I A and MB, of
<
lb
/>
the arches IA and M B; whereupon the Inhabitants of the circle
<
lb
/>
begin to enjoy the light, and the other Inhabitants of the circle
<
lb
/>
L M to partake of night. </
s
>
<
s
>And thus you ſee that by two ſimple
<
lb
/>
motions made in times proportionate to their bigneſſes, and not
<
lb
/>
contrary to one another, but performed, as all others that
<
lb
/>
long to moveable mundane bodies, from Weſt to Eaſt aſſigned
<
lb
/>
to the Terreſtrial Globe, adequate reaſons are rendred of all
<
lb
/>
thoſe
<
emph
type
="
italics
"/>
Phænomena
<
emph.end
type
="
italics
"/>
or appearances, for the accommodating of </
s
>
</
p
>
</
chap
>
</
body
>
</
text
>
</
archimedes
>