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
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
<
1 - 30
31 - 60
61 - 77
>
page
|<
<
of 77
>
>|
<
archimedes
>
<
text
>
<
body
>
<
chap
>
<
p
type
="
main
">
<
s
>
<
pb
pagenum
="
459
"/>
the Gravity of the water, yet the caſe ſtands ſo, that the Rampart
<
lb
/>
doth alſo contract it ſelf, and the Cylinder contained in it doth
<
lb
/>
miniſh. </
s
>
<
s
>Nevertheleſs it ſhall be demonſtrated, how that the Cone
<
lb
/>
<
emph
type
="
italics
"/>
A B D
<
emph.end
type
="
italics
"/>
being of any ſuppoſed bigneſſe, and made at the firſt of a
<
lb
/>
Matter exactly equall in Gravity to the Water, if there may
<
lb
/>
be affixed to it ſome Weight, by means of which it may deſcend to
<
lb
/>
the bottom, when ſubmerged under water, it may alſo by vertue of
<
lb
/>
the Rampart ſtay above without ſinking.</
s
>
</
p
>
<
p
type
="
main
">
<
s
>Let, therefore, the Cone
<
emph
type
="
italics
"/>
A B D
<
emph.end
type
="
italics
"/>
be of any ſuppoſed greatneſſe,
<
lb
/>
and alike in ſpecificall Gravity to the water. </
s
>
<
s
>It is manifeſt, that
<
lb
/>
being put lightly into the water, it ſhall reſt without deſcending;
<
lb
/>
and it ſhall advance above water, the Point
<
lb
/>
<
figure
id
="
fig279
"
number
="
18
"/>
<
lb
/>
<
emph
type
="
italics
"/>
AS T,
<
emph.end
type
="
italics
"/>
tripple in height to the height of the
<
lb
/>
Rampart
<
emph
type
="
italics
"/>
E S
<
emph.end
type
="
italics
"/>
: Now, ſuppoſe the Cone
<
emph
type
="
italics
"/>
A B D
<
emph.end
type
="
italics
"/>
<
lb
/>
more depreſſed, ſo that it advance above
<
lb
/>
ter, only the Point
<
emph
type
="
italics
"/>
A I R,
<
emph.end
type
="
italics
"/>
higher by half than
<
lb
/>
the Point
<
emph
type
="
italics
"/>
A S T,
<
emph.end
type
="
italics
"/>
with the Rampart about it
<
lb
/>
<
emph
type
="
italics
"/>
C I R N.
<
emph.end
type
="
italics
"/>
And, becauſe, the Cone
<
emph
type
="
italics
"/>
A B D
<
emph.end
type
="
italics
"/>
is
<
lb
/>
to the Cone
<
emph
type
="
italics
"/>
A I R,
<
emph.end
type
="
italics
"/>
as the cube of the Line
<
emph
type
="
italics
"/>
S T
<
emph.end
type
="
italics
"/>
<
lb
/>
is to the cube of the Line
<
emph
type
="
italics
"/>
I R,
<
emph.end
type
="
italics
"/>
but the
<
lb
/>
der
<
emph
type
="
italics
"/>
E S T O,
<
emph.end
type
="
italics
"/>
is to the Cylinder
<
emph
type
="
italics
"/>
C I R N,
<
emph.end
type
="
italics
"/>
as the Square of
<
emph
type
="
italics
"/>
S T
<
emph.end
type
="
italics
"/>
to
<
lb
/>
the Square of
<
emph
type
="
italics
"/>
I R,
<
emph.end
type
="
italics
"/>
the Cone
<
emph
type
="
italics
"/>
A S T
<
emph.end
type
="
italics
"/>
ſhall be Octuple to the Cone
<
lb
/>
<
emph
type
="
italics
"/>
A I R,
<
emph.end
type
="
italics
"/>
and the Cylinder
<
emph
type
="
italics
"/>
E S T O,
<
emph.end
type
="
italics
"/>
quadruple to the Cylinder
<
emph
type
="
italics
"/>
C I R N
<
emph.end
type
="
italics
"/>
:
<
lb
/>
But the Cone
<
emph
type
="
italics
"/>
A S T,
<
emph.end
type
="
italics
"/>
is equall to the Cylinder E
<
emph
type
="
italics
"/>
S T O
<
emph.end
type
="
italics
"/>
: Therefore,
<
lb
/>
the Cylinder
<
emph
type
="
italics
"/>
C I R N,
<
emph.end
type
="
italics
"/>
ſhall be double to the Cone
<
emph
type
="
italics
"/>
A I R:
<
emph.end
type
="
italics
"/>
and the
<
lb
/>
water which might be contained in the Rampart
<
emph
type
="
italics
"/>
C I R N,
<
emph.end
type
="
italics
"/>
would be
<
lb
/>
double in Maſs and in Weight to the Cone
<
emph
type
="
italics
"/>
A I R,
<
emph.end
type
="
italics
"/>
and, therefore,
<
lb
/>
would be able to ſuſtain the double of the Weight of the Cone
<
emph
type
="
italics
"/>
AIR
<
emph.end
type
="
italics
"/>
:
<
lb
/>
Therefore, if to the whole Cone
<
emph
type
="
italics
"/>
A B D,
<
emph.end
type
="
italics
"/>
there be added as much
<
lb
/>
Weight as the Gravity of the Cone
<
emph
type
="
italics
"/>
A I R,
<
emph.end
type
="
italics
"/>
that is to ſay, the eighth
<
lb
/>
part of the weight of the Cone
<
emph
type
="
italics
"/>
A S T,
<
emph.end
type
="
italics
"/>
it alſo ſhall be ſuſtained by
<
lb
/>
the Rampart
<
emph
type
="
italics
"/>
C I R N,
<
emph.end
type
="
italics
"/>
but without that it ſhall go to the bottome:
<
lb
/>
the Cone
<
emph
type
="
italics
"/>
A B D,
<
emph.end
type
="
italics
"/>
being, by the addition of the eighth part of the
<
lb
/>
weight of the Cone
<
emph
type
="
italics
"/>
A S T,
<
emph.end
type
="
italics
"/>
made ſpecifically more grave than the
<
lb
/>
water. </
s
>
<
s
>But if the Altitude of the Cone
<
emph
type
="
italics
"/>
A I R,
<
emph.end
type
="
italics
"/>
were two thirds
<
lb
/>
of the Altitude of the Cone
<
emph
type
="
italics
"/>
A S T,
<
emph.end
type
="
italics
"/>
the Cone
<
emph
type
="
italics
"/>
A S T
<
emph.end
type
="
italics
"/>
would be to the
<
lb
/>
Cone
<
emph
type
="
italics
"/>
A I R,
<
emph.end
type
="
italics
"/>
as twenty ſeven to eight; and the Cylinder
<
emph
type
="
italics
"/>
E S T O,
<
emph.end
type
="
italics
"/>
to
<
lb
/>
the Cylinder
<
emph
type
="
italics
"/>
C I R N,
<
emph.end
type
="
italics
"/>
as nine to four, that is, as twenty ſeven to
<
lb
/>
twelve; and, therefore, the Cylinder
<
emph
type
="
italics
"/>
C I R N,
<
emph.end
type
="
italics
"/>
to the Cone
<
emph
type
="
italics
"/>
A I R,
<
emph.end
type
="
italics
"/>
<
lb
/>
as twelve to eight; and the exceſs of the Cylinder
<
emph
type
="
italics
"/>
C I R N,
<
emph.end
type
="
italics
"/>
above
<
lb
/>
the Cone
<
emph
type
="
italics
"/>
A I R,
<
emph.end
type
="
italics
"/>
to the Cone
<
emph
type
="
italics
"/>
A S T,
<
emph.end
type
="
italics
"/>
as four to twenty ſeven:
<
lb
/>
fore if to the Cone
<
emph
type
="
italics
"/>
A B D
<
emph.end
type
="
italics
"/>
be added ſo much weight as is the four
<
lb
/>
twenty ſevenths of the weight of the Cone
<
emph
type
="
italics
"/>
A S T,
<
emph.end
type
="
italics
"/>
which is a little
<
lb
/>
more then its ſeventh part, it alſo ſhall continue to ſwimme, and </
s
>
</
p
>
</
chap
>
</
body
>
</
text
>
</
archimedes
>