Alberti, Leone Battista
,
De re aedificatoria
,
1485
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<
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id
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N40001A
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<
p
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N409E2D
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type
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main
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<
s
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N40A066
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<
pb
xlink:href
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004/01/216.jpg
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cetur: atque in pictura ad ſupremum caput axis adſcribetur
<
lb
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Quam quidem diametrum cum erit deſcripta in particu
<
lb
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las diuidemus duodecim. </
s
>
<
s
id
="
N40A07B
">Harum particularum integram
<
lb
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unam occupabunt una torquis et nextrum ſummæ proiectu
<
lb
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ræ. </
s
>
<
s
id
="
N40A084
">Sic nam torquis huius ipſius xii. </
s
>
<
s
id
="
N40A087
">tertiam capiet bis: reli
<
lb
/>
quum dabitur nextro. </
s
>
<
s
id
="
N40A08C
">Sed hac proiectura erit retractio: cu
<
lb
/>
ius centrum diſtabit a centro ſupremi circuli proiecturæ ex
<
lb
/>
particulis illius. xii. una atque inſuper dimidia. </
s
>
<
s
id
="
N40A099
">Eritque retra
<
lb
/>
ctionis ipſius diameter minus diametro maximo proiecturæ
<
lb
/>
ex illius nona. </
s
>
<
s
id
="
N40A0A0
">Poſt hæc ducetur inflexa linea ductu quali
<
lb
/>
infimam duximus inflexuram. </
s
>
<
s
id
="
N40A0A5
">Demum perſcriptis in pictu
<
lb
/>
ra proiectionibus / retractionibus / obliquis inflexuris et
<
expan
abbr
="
uẽtris
">uen
<
lb
/>
tris</
expan
>
diametro ducetur linea recta a capite
<
expan
abbr
="
retractiõis
">retractionis</
expan
>
ſupre
<
lb
/>
mæ atque item a capite imæ retractionis ad caput diametri:
<
lb
/>
qua uentrem notarimus. </
s
>
<
s
id
="
N40A0B8
">Itaque his quas
<
expan
abbr
="
recẽſuimus
">recenſuimus</
expan
>
perſcrip
<
lb
/>
tionibus linea quæ finitor dicitur compoſita eſt. </
s
>
<
s
id
="
N40A0C1
">Ad cuius
<
lb
/>
lineæ modum tabula gracilis deformabitur / qua fabri lapi
<
lb
/>
cidæ iuſtum columnæ ambitum et finitiones captent atque
<
lb
/>
terminent. </
s
>
<
s
id
="
N40A0CA
">Scapi imi ſuperficies ſi erit columna bene torna
<
lb
/>
ta ad pares utrinque angulos medii
<
expan
abbr
="
perpẽdiculi
">perpendiculi</
expan
>
coæquabitur
<
lb
/>
ducto radio a
<
expan
abbr
="
cẽtro
">centro</
expan
>
circuli / qui in ſuprema columnæ ſuper
<
lb
/>
ficie ſit. </
s
>
<
s
id
="
N40A0DB
">Hæc a ueteribus litteris tradita
<
expan
abbr
="
nõ
">non</
expan
>
inuenimus: ſed
<
lb
/>
diligentia ſtudioque ex optimorum operibus annotauimus.
<
lb
/>
</
s
>
<
s
id
="
N40A0E5
">Quæ ſequentur ad iſtiuſmodi lineamentorum rationes ma
<
lb
/>
xima ex parte pertinebunt: eruntque multo digniſſima et ad
<
lb
/>
pictorum delitias mirifice conferent.</
s
>
</
p
>
<
p
id
="
N40A0EC
"
type
="
head
">
<
s
id
="
N40A0EE
">LEONIS BAPTISTAE ALBERTI DE RE
<
lb
/>
AEDIFICATORIA LIBER SEPTIMVS
<
lb
/>
QVI SACRORVM ORNAMENTVM
<
lb
/>
INSCRIBITVR.</
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>
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