Alberti, Leone Battista
,
De re aedificatoria
,
1485
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<
text
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<
body
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<
chap
id
="
N40001A
">
<
p
id
="
N400C14
"
type
="
main
">
<
s
id
="
N400CFC
">
<
pb
xlink:href
="
004/01/020.jpg
"/>
cætera generis eiuſdem: de quibus ſuo loco diſtinctius loquemur
<
lb
/>
Aliud enim foro / aliud theatro / aliud paleſtræ / aliud templo ſpa
<
lb
/>
tii locorumque debetur. </
s
>
<
s
id
="
N400D21
">Itaque pro cuiuſque ratione et uſu habendus
<
lb
/>
areæ ſitus erit & modus. </
s
>
<
s
id
="
N400D26
">Verum hoc loco ut generatim iſta / uti
<
lb
/>
cepimus / proſequamur / ea tantum attingemus: quæ fore neceſſa
<
lb
/>
ria arbitramur / Si prius de lineis aliqua retulero / quæ ad rem
<
expan
abbr
="
cõmode
">com
<
lb
/>
mode</
expan
>
exprimendam faciant. </
s
>
<
s
id
="
N400D33
">Nam de areæ deſcriptione tractanti
<
lb
/>
bus conuenit ut de his tranſigamus / quibus ipſa perſcriptio anno
<
lb
/>
tatur. </
s
>
<
s
id
="
N400D3A
">Omnis igitur perſcriptio lineis fit & angulis / Lineæ qui
<
lb
/>
dem ſunt extrema perſcriptio / qua integræ areæ ſpatium circun
<
lb
/>
cluditur. </
s
>
<
s
id
="
N400D41
">
<
expan
abbr
="
Hãc
">Hanc</
expan
>
uero ad perſcriptionem pars illa ſuperficiei ſubſti
<
lb
/>
tuta / quæ intra duas mutuo ſe ſe intercidentes lineas continetur /
<
lb
/>
angulus dicitur. </
s
>
<
s
id
="
N400D4B
">Atqui ex mutua quidem duarum linearum
<
expan
abbr
="
ĩter
">inter</
expan
>
<
lb
/>
ſectione quatuor conſcribuntur anguli: Quorum ſi erit quiſque
<
lb
/>
quibuſque trium reliquorum equalis / recti nuncupabuntur: Et qui
<
lb
/>
recto minores erunt / acuti appellabuntur: ut qui recto ampliores
<
lb
/>
obtuſi dicentur. </
s
>
<
s
id
="
N400D5A
">Linearum item alia recta / alia flexa / cocleas &
<
lb
/>
uerticoſas lineas hic non eſt ut referam. </
s
>
<
s
id
="
N400D5F
">Recta linea a puncto eſt
<
lb
/>
ad punctum ob longa perſcriptio / ducta ita ut fieri nulla poſſit
<
lb
/>
breuior. </
s
>
<
s
id
="
N400D66
">Flexa linea pars eſt circuli. </
s
>
<
s
id
="
N400D69
">Circulus eſt ea perſcriptio
<
lb
/>
facta ab altero duorum punctorum: qui in eadem ſuperficie ita
<
lb
/>
ſit circumactus / ut toto perſcriptionis ductu ſemper neque plus: ne
<
lb
/>
que diſtet minus a medio immobili / quem obambiat puncto /
<
expan
abbr
="
q̈
">quam</
expan
>
<
expan
abbr
="
cũ
">cum</
expan
>
<
lb
/>
primum circunduci occeperat. </
s
>
<
s
id
="
N400D7C
">Sed his addendum quod flexa line
<
lb
/>
a quam eſſe partem circuli diximus / apud nos hic architectos ſi
<
lb
/>
militudinis gratia arcus uocatur. </
s
>
<
s
id
="
N400D83
">Et quæ linea aduobus extremis
<
lb
/>
punctis flexæ lineæ directa ducitur pari ſimilitudine corda
<
expan
abbr
="
nuncupabit̃
">nun
<
lb
/>
cupabitur</
expan
>
. </
s
>
<
s
id
="
N400D8D
">Et quæ linea a puncto mediæ corde coæquabilibus
<
expan
abbr
="
utrĩ
">utris</
expan
>
<
lb
/>
que angulis ad arcum uſque perducta extiterit / ſagicta appellabitur
<
lb
/>
Et quæ linea a puncto
<
expan
abbr
="
ĩmobili/qd
">immobili / quod</
expan
>
intra circulum eſt ad
<
expan
abbr
="
flexã
">flexam</
expan
>
ean
<
lb
/>
demque
<
expan
abbr
="
extremã
">extremam</
expan
>
circuli
<
expan
abbr
="
lineã
">lineam</
expan
>
<
expan
abbr
="
pduceret̃/radius
">perduceretur / radius</
expan
>
<
expan
abbr
="
dicet̃
">dicetur</
expan
>
. </
s
>
<
s
id
="
N400DB2
">Et
<
expan
abbr
="
pũcto
">puncto</
expan
>
quod
<
lb
/>
huic
<
expan
abbr
="
ĩmobili/quod
">immobili / quod</
expan
>
medium intra circulum aſſidet centro nomen
<
lb
/>
erit: Et quæ linea recta
<
expan
abbr
="
pcentrũ
">per centrum</
expan
>
tranſiens duobus locis
<
expan
abbr
="
flexã
">flexam</
expan
>
circu
<
lb
/>
li
<
expan
abbr
="
lineã
">lineam</
expan
>
ſecabit / diameter
<
expan
abbr
="
appellabit̃
">appellabitur</
expan
>
. </
s
>
<
s
id
="
N400DD3
">Inter arcus
<
expan
abbr
="
itẽ
">item</
expan
>
differentia eſt </
s
>
</
p
>
</
chap
>
</
body
>
</
text
>
</
archimedes
>