Galilei, Galileo
,
Discourse concerning the natation of bodies
,
1663
Text
Text Image
XML
Document information
None
Concordance
Figures
Thumbnails
Page concordance
<
1 - 30
31 - 60
61 - 77
>
Scan
Original
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
<
1 - 30
31 - 60
61 - 77
>
page
|<
<
of 77
>
>|
<
archimedes
>
<
text
>
<
body
>
<
chap
>
<
p
type
="
main
">
<
s
>
<
pb
pagenum
="
419
"/>
Solid that weighs above 100 pounds: in that we have
<
lb
/>
ted, That it ſufficeth, that ſuch difference be found between the
<
lb
/>
Specificall Gravities of the
<
emph
type
="
italics
"/>
Mediums
<
emph.end
type
="
italics
"/>
and Moveables, let the particular
<
lb
/>
and abſolute Gravities be what they will: inſomuch, that a Solid,
<
lb
/>
provided that it be Specifically leſs grave than the water, although
<
lb
/>
its abſolute weight were 1000 pounds, yet may it be born up and
<
lb
/>
elevated by ten pounds of water, and leſs: and on the contrary,
<
lb
/>
nother Solid, ſo that it be Specifically more grave than the water,
<
lb
/>
though in abſolute Gravity it were not above a pound, yet all the
<
lb
/>
water in the Sea, cannot raiſe it from the Bottom, or float it. </
s
>
<
s
>This
<
lb
/>
ſufficeth me, for my preſent occaſion, to have, by the above declared
<
lb
/>
Examples, diſcovered and demonſtrated, without extending ſuch
<
lb
/>
matters farther, and, as I might have done, into a long Treatiſe:
<
lb
/>
yea, but that there was a neceſſity of reſolving the above propoſed
<
lb
/>
doubt, I ſhould have contented my ſelf with that only, which is
<
lb
/>
demonſtrated by
<
emph
type
="
italics
"/>
Archimedes,
<
emph.end
type
="
italics
"/>
in his firſt Book
<
emph
type
="
italics
"/>
De Inſidentibus
<
lb
/>
mido
<
emph.end
type
="
italics
"/>
: where in generall termes he infers and confirms the ſame </
s
>
</
p
>
<
p
type
="
main
">
<
s
>
<
arrow.to.target
n
="
marg1422
"/>
<
lb
/>
<
arrow.to.target
n
="
marg1423
"/>
<
lb
/>
Concluſions, namely, that Solids (
<
emph
type
="
italics
"/>
a
<
emph.end
type
="
italics
"/>
) leſs grave than water, ſwim or
<
lb
/>
<
arrow.to.target
n
="
marg1424
"/>
<
lb
/>
float upon it, the (
<
emph
type
="
italics
"/>
b
<
emph.end
type
="
italics
"/>
) more grave go to the Bottom, and the (
<
emph
type
="
italics
"/>
c
<
emph.end
type
="
italics
"/>
)
<
lb
/>
<
arrow.to.target
n
="
marg1425
"/>
<
lb
/>
qually grave reſt indifferently in all places, yea, though they ſhould
<
lb
/>
be wholly under water.</
s
>
</
p
>
<
p
type
="
margin
">
<
s
>
<
margin.target
id
="
marg1422
"/>
<
emph
type
="
italics
"/>
Of Natation
<
emph.end
type
="
italics
"/>
</
s
>
</
p
>
<
p
type
="
margin
">
<
s
>
<
margin.target
id
="
marg1423
"/>
(a)
<
emph
type
="
italics
"/>
Lib. 1. Prop.
<
emph.end
type
="
italics
"/>
4.</
s
>
</
p
>
<
p
type
="
margin
">
<
s
>
<
margin.target
id
="
marg1424
"/>
(b)
<
emph
type
="
italics
"/>
Id. </
s
>
<
s
>Lib. </
s
>
<
s
>1.
<
lb
/>
Prop.
<
emph.end
type
="
italics
"/>
3.</
s
>
</
p
>
<
p
type
="
margin
">
<
s
>
<
margin.target
id
="
marg1425
"/>
(c)
<
emph
type
="
italics
"/>
Id. </
s
>
<
s
>Lib. 1.
<
lb
/>
Prop.
<
emph.end
type
="
italics
"/>
3.</
s
>
</
p
>
<
p
type
="
main
">
<
s
>But, becauſe that this Doctrine of
<
emph
type
="
italics
"/>
Archimedes,
<
emph.end
type
="
italics
"/>
peruſed,
<
lb
/>
<
arrow.to.target
n
="
marg1426
"/>
<
lb
/>
bed and examined by
<
emph
type
="
italics
"/>
Signor Franceſco Buonamico,
<
emph.end
type
="
italics
"/>
in his
<
emph
type
="
italics
"/>
fifth Book
<
lb
/>
of Motion, Chap.
<
emph.end
type
="
italics
"/>
29, and afterwards by him confuted, might by the
<
lb
/>
Authority of ſo renowned, and famous a Philoſopher, be rendered
<
lb
/>
dubious, and ſuſpected of falſity; I have judged it neceſſary to
<
lb
/>
fend it, if I am able ſo to do, and to clear
<
emph
type
="
italics
"/>
Archimedes,
<
emph.end
type
="
italics
"/>
from thoſe
<
lb
/>
cenſures, with which he appeareth to be charged.
<
emph
type
="
italics
"/>
Buonamico
<
emph.end
type
="
italics
"/>
<
lb
/>
<
arrow.to.target
n
="
marg1427
"/>
<
lb
/>
jecteth the Doctrine of
<
emph
type
="
italics
"/>
Archimedes,
<
emph.end
type
="
italics
"/>
firſt, as not conſentaneous with
<
lb
/>
the Opinion of
<
emph
type
="
italics
"/>
Aristotle,
<
emph.end
type
="
italics
"/>
adding, that it was a ſtrange thing to him,
<
lb
/>
<
arrow.to.target
n
="
marg1428
"/>
<
lb
/>
that the Water ſhould exceed the Earth in Gravity, ſeeing on the
<
lb
/>
contrary, that the Gravity of water, increaſeth, by means of the
<
lb
/>
<
arrow.to.target
n
="
marg1429
"/>
<
lb
/>
cipation of Earth. </
s
>
<
s
>And he ſubjoyns preſently after, that he was
<
lb
/>
not ſatisfied with the Reaſons of
<
emph
type
="
italics
"/>
Archimedes,
<
emph.end
type
="
italics
"/>
as not being able with
<
lb
/>
that Doctrine, to aſſign the cauſe whence it comes, that a Boat and
<
lb
/>
a Veſſell, which otherwiſe, floats above the water, doth ſink to the
<
lb
/>
Bottom, if once it be filled with water; that by reaſon of the
<
lb
/>
quality of Gravity, between the water within it, and the other water
<
lb
/>
without, it ſhould ſtay a top; but yet, nevertheleſs, we ſee it to go to
<
lb
/>
the
<
lb
/>
<
arrow.to.target
n
="
marg1430
"/>
</
s
>
</
p
>
<
p
type
="
margin
">
<
s
>
<
margin.target
id
="
marg1426
"/>
The
<
emph
type
="
italics
"/>
Authors
<
emph.end
type
="
italics
"/>
<
lb
/>
defence of
<
emph
type
="
italics
"/>
<
lb
/>
chimedes
<
emph.end
type
="
italics
"/>
his
<
lb
/>
ctrine, againſt
<
lb
/>
the oppoſitions
<
lb
/>
of
<
emph
type
="
italics
"/>
Buonamico.
<
emph.end
type
="
italics
"/>
</
s
>
</
p
>
<
p
type
="
margin
">
<
s
>
<
margin.target
id
="
marg1427
"/>
His firſt
<
lb
/>
on againſt the
<
lb
/>
Doctrine of
<
emph
type
="
italics
"/>
<
lb
/>
chimedes.
<
emph.end
type
="
italics
"/>
</
s
>
</
p
>
<
p
type
="
margin
">
<
s
>
<
margin.target
id
="
marg1428
"/>
His Second
<
lb
/>
jection.</
s
>
</
p
>
<
p
type
="
margin
">
<
s
>
<
margin.target
id
="
marg1429
"/>
His third
<
lb
/>
ction.</
s
>
</
p
>
<
p
type
="
margin
">
<
s
>
<
margin.target
id
="
marg1430
"/>
His ſourth
<
lb
/>
jection.</
s
>
</
p
>
<
p
type
="
main
">
<
s
>He farther addes, that
<
emph
type
="
italics
"/>
Ariſtotle
<
emph.end
type
="
italics
"/>
had clearly confuted the Ancients,
<
lb
/>
who ſaid, that light Bodies moved upwards, driven by the impulſe </
s
>
</
p
>
<
p
type
="
main
">
<
s
>
<
arrow.to.target
n
="
marg1431
"/>
<
lb
/>
of the more grave Ambient: which if it were ſo, it ſhould ſeem of
<
lb
/>
neceſſity to follow, that all naturall Bodies are by nature heavy, </
s
>
</
p
>
</
chap
>
</
body
>
</
text
>
</
archimedes
>