Galilei, Galileo
,
The systems of the world
,
1661
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 - 720
721 - 750
751 - 780
781 - 810
811 - 840
841 - 870
871 - 900
901 - 930
931 - 948
>
Scan
Original
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
<
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 - 720
721 - 750
751 - 780
781 - 810
811 - 840
841 - 870
871 - 900
901 - 930
931 - 948
>
page
|<
<
of 948
>
>|
<
archimedes
>
<
text
>
<
body
>
<
chap
>
<
p
type
="
main
">
<
s
>
<
pb
xlink:href
="
065/01/070.jpg
"
pagenum
="
64
"/>
ſolar rays come: but it is true that by the vivacity of the light, the
<
lb
/>
ſaid image will appear fringed about with many rays, and ſo will
<
lb
/>
ſeem to occupie a far greater part of the plate, than really it doth.
<
lb
/>
</
s
>
<
s
>And to ſhew that this is true, when you have noted the particular
<
lb
/>
place of the plate from whence the reflection cometh, and
<
lb
/>
ved likewiſe how great the ſhining place appeared to you, cover the
<
lb
/>
greater part of that ſame ſpace, leaving it only viſible about the
<
lb
/>
midſt; and all this ſhall not any whit diminiſh the apparent
<
lb
/>
dor to one that beholds it from afar; but you ſhall ſee it largely
<
lb
/>
diſpers'd upon the cloth or other matter, wherewith you covered
<
lb
/>
it. </
s
>
<
s
>If therefore any one, by ſeeing from a good diſtance a ſmall
<
lb
/>
gilt plate to be all over ſhining, ſhould imagine that the ſame
<
lb
/>
would alſo even in a plate as broad as the Moon, he is no leſs
<
lb
/>
ceived, than if he ſhould believe the Moon to be no bigger than
<
lb
/>
the bottom of a tub. </
s
>
<
s
>If again the plate were turn'd into a
<
lb
/>
rical ſuperficies, the reflection would be ſeen ſtrong in but one ſole
<
lb
/>
particle of it; but yet by reaſon of its livelineſs, it will appear
<
lb
/>
fringed about with many glittering rays: the reſt of the Ball would
<
lb
/>
appear according as it was burniſhed; and this alſo onely then
<
lb
/>
<
arrow.to.target
n
="
marg173
"/>
<
lb
/>
when it was not very much poliſhed, for ſhould it be perfectly
<
lb
/>
brightned, it would appear obſcure. </
s
>
<
s
>An example of this we
<
lb
/>
have dayly before our eyes in ſilver veſſels, which whilſt they are
<
lb
/>
only boyl'd in the
<
emph
type
="
italics
"/>
Argol
<
emph.end
type
="
italics
"/>
and
<
emph
type
="
italics
"/>
Salt,
<
emph.end
type
="
italics
"/>
they are all as white as ſnow, and
<
lb
/>
do not reflect any image; but if they be in any part burniſh'd, they
<
lb
/>
become in that place preſently obſcure: and in them one may ſee the
<
lb
/>
repreſentation of any thing as in Looking-glaſſes. </
s
>
<
s
>And that
<
lb
/>
to obſcurity, proceeds from nothing elſe but the ſmoothing and
<
lb
/>
plaining of a fine grain, which made the ſuperficies of the ſilver
<
lb
/>
rough, and yet ſuch, as that it reflected the light into all parts,
<
lb
/>
whereby it ſeemed from all parts equally illuminated: which
<
lb
/>
ſmall unevenneſſes, when they come to be exquiſitely plained by
<
lb
/>
the burniſh, ſo that the reflection of the rays of incidence are all
<
lb
/>
directed unto one determinate place; then, from that ſame place,
<
lb
/>
the burniſh'd part ſhall ſhew much more bright and ſhining than
<
lb
/>
the reſt which is onely whitened by boyling; but from all other
<
lb
/>
places it looks very obſcure. </
s
>
<
s
>And note, that the diverſity of
<
lb
/>
<
arrow.to.target
n
="
marg174
"/>
<
lb
/>
ſights of looking upon burniſh'd ſuperficies, occaſioneth ſuch
<
lb
/>
difference in appearances, that to imitate and repreſent in picture,
<
lb
/>
<
emph
type
="
italics
"/>
v. </
s
>
<
s
>g.
<
emph.end
type
="
italics
"/>
a poliſh'd Cuirace, one muſt couple black plains with white,
<
lb
/>
one ſideways to the other, in thoſe parts of the arms where the
<
lb
/>
light falleth equally.</
s
>
</
p
>
<
p
type
="
margin
">
<
s
>
<
margin.target
id
="
marg171
"/>
<
emph
type
="
italics
"/>
Some write what
<
lb
/>
they underſtand
<
lb
/>
not, and therefore
<
lb
/>
underſtand not
<
lb
/>
what they write.
<
emph.end
type
="
italics
"/>
</
s
>
</
p
>
<
p
type
="
margin
">
<
s
>
<
margin.target
id
="
marg172
"/>
<
emph
type
="
italics
"/>
Diamonds ground
<
lb
/>
to divers ſides, &
<
lb
/>
why.
<
emph.end
type
="
italics
"/>
</
s
>
</
p
>
<
p
type
="
margin
">
<
s
>
<
margin.target
id
="
marg173
"/>
<
emph
type
="
italics
"/>
Silver burniſhed
<
lb
/>
appears more
<
lb
/>
ſcuee, than the not
<
lb
/>
burniſhed, & why.
<
emph.end
type
="
italics
"/>
</
s
>
</
p
>
<
p
type
="
margin
">
<
s
>
<
margin.target
id
="
marg174
"/>
<
emph
type
="
italics
"/>
Burniſh'd Steel
<
lb
/>
beheld from one
<
lb
/>
place appears very
<
lb
/>
bright, and from
<
lb
/>
another, very
<
lb
/>
ſcure.
<
emph.end
type
="
italics
"/>
</
s
>
</
p
>
<
p
type
="
main
">
<
s
>SAGR. </
s
>
<
s
>If therefore theſe great Philoſophers would acquieſe
<
lb
/>
in granting, that the Moon,
<
emph
type
="
italics
"/>
Venus
<
emph.end
type
="
italics
"/>
and the other Planets, were not
<
lb
/>
of ſo bright and ſmooth a ſurface as a Looking-glaſs, but wanted
<
lb
/>
ſome ſmall matter of it, namely, were as a ſilver plate, onely boyled </
s
>
</
p
>
</
chap
>
</
body
>
</
text
>
</
archimedes
>