Galilei, Galileo
,
The systems of the world
,
1661
Text
Text Image
Image
XML
Thumbnail overview
Document information
None
Concordance
Figures
Thumbnails
page
|<
<
of 948
>
>|
<
archimedes
>
<
text
>
<
body
>
<
chap
>
<
p
type
="
main
">
<
s
>
<
pb
xlink:href
="
065/01/080.jpg
"
pagenum
="
74
"/>
the wall hath it? </
s
>
<
s
>The Sun ſhineth on that wall; from thence it </
s
>
</
p
>
<
p
type
="
main
">
<
s
>
<
arrow.to.target
n
="
marg191
"/>
<
lb
/>
is reverberated upon the wall of the Hall, from thence it's
<
lb
/>
cted upon that chamber, ſo that it falls on it at the third reflection:
<
lb
/>
and I am very certain, that there is in that place more light, than
<
lb
/>
if the Moons light had directly faln upon it.</
s
>
</
p
>
<
p
type
="
margin
">
<
s
>
<
margin.target
id
="
marg191
"/>
<
emph
type
="
italics
"/>
The third
<
lb
/>
ction of a Wall
<
lb
/>
minates more than
<
lb
/>
the firſt of the
<
lb
/>
Moon.
<
emph.end
type
="
italics
"/>
</
s
>
</
p
>
<
p
type
="
main
">
<
s
>SIMPL. </
s
>
<
s
>But this I cannot believe; for the illumination of the
<
lb
/>
Moon, eſpecially when it is at the full, is very great.</
s
>
</
p
>
<
p
type
="
main
">
<
s
>SAGR. </
s
>
<
s
>It ſeemeth great by reaſon of the circumjacent dark
<
lb
/>
<
arrow.to.target
n
="
marg192
"/>
<
lb
/>
places; but abſolutely it is not much, and is leſs than that of the
<
lb
/>
twilight half an hour after the Sun is ſet; which is manifeſt,
<
lb
/>
cauſe you ſee not the ſhadows of the bodies illuminated by the
<
lb
/>
Moon till then, to begin to be diſtinguiſhed on the Earth. </
s
>
<
s
>
<
lb
/>
ther, again, that third reflection upon that chamber, illuminates
<
lb
/>
more than the firſt of the Moon, may be known by going thether,
<
lb
/>
and reading a Book, and afterwards ſtanding there in the night
<
lb
/>
by the Moons light, which will ſhew by which of them lights one
<
lb
/>
may read more or leſs plainly, but I believe without further tryal,
<
lb
/>
that one ſhould ſee leſs diſtinctly by this later.</
s
>
</
p
>
<
p
type
="
margin
">
<
s
>
<
margin.target
id
="
marg192
"/>
<
emph
type
="
italics
"/>
The light of the
<
lb
/>
Moon weaker than
<
lb
/>
that of the
<
lb
/>
light.
<
emph.end
type
="
italics
"/>
</
s
>
</
p
>
<
p
type
="
main
">
<
s
>SALV. Now,
<
emph
type
="
italics
"/>
Simplicius,
<
emph.end
type
="
italics
"/>
(if haply you be ſatisfied) you may
<
lb
/>
conceive, as you your ſelf know very well, that the Earth doth
<
lb
/>
ſhine no leſs than the Moon; and the only remembring you of ſome
<
lb
/>
things, which you knew of your ſelf, and learn'd not of me, hath
<
lb
/>
aſſured you thereof: for I taught you not that the Moon ſhews
<
lb
/>
lighter by night than by day, but you underſtood it of your ſelf;
<
lb
/>
as alſo you could tell me that a little Cloud appeareth as lucid as
<
lb
/>
the Moon: you knew alſo, that the illumination of the Earth
<
lb
/>
not be ſeen by night; and in a word, you knew all this, without
<
lb
/>
knowing that you knew it. </
s
>
<
s
>So that you have no reaſon to be
<
lb
/>
pulous of granting, that the dark part of the Earth may illuminate
<
lb
/>
the dark part of the Moon, with no leſs a light than that
<
lb
/>
with the Moon illuminates the obſcurities of the night, yea rather
<
lb
/>
ſo much the greater, inaſmuch as the Earth is forty times bigger
<
lb
/>
than the Moon.</
s
>
</
p
>
<
p
type
="
main
">
<
s
>SIMPL. </
s
>
<
s
>I muſt confeſs that I did believe, that that ſecondary
<
lb
/>
light had been the natural light of the Moon.</
s
>
</
p
>
<
p
type
="
main
">
<
s
>SALV. </
s
>
<
s
>And this alſo you know of your ſelf, and perceive not
<
lb
/>
that you know it. </
s
>
<
s
>Tell me, do not you know without teaching,
<
lb
/>
that the Moon ſhews it ſelf more bright by night than by day, in
<
lb
/>
<
arrow.to.target
n
="
marg193
"/>
<
lb
/>
reſpect of the obſcurity of the ſpace of the ambient? </
s
>
<
s
>and
<
lb
/>
quently, do you not know
<
emph
type
="
italics
"/>
in genere,
<
emph.end
type
="
italics
"/>
that every bright body ſhews
<
lb
/>
the clearer, by how much the ambient is obſcurer?</
s
>
</
p
>
<
p
type
="
margin
">
<
s
>
<
margin.target
id
="
marg193
"/>
<
emph
type
="
italics
"/>
Luminous bodies
<
lb
/>
appear the brighter
<
lb
/>
in an obſcurer
<
emph.end
type
="
italics
"/>
<
lb
/>
bient.</
s
>
</
p
>
<
p
type
="
main
">
<
s
>SIMPL. </
s
>
<
s
>This I know very well.</
s
>
</
p
>
<
p
type
="
main
">
<
s
>SALV. </
s
>
<
s
>When the Moon is horned, and that ſecondary light
<
lb
/>
ſeemeth to you very bright, is it not ever nigh the Sun, and
<
lb
/>
ſequently, in the light of the
<
emph
type
="
italics
"/>
crepuſculum,
<
emph.end
type
="
italics
"/>
(twilight?)</
s
>
</
p
>
</
chap
>
</
body
>
</
text
>
</
archimedes
>