Vitruvius
,
L. Victrvvii Pollionis ad Cesarem Avgvstvm De architectvra
,
1490
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ſcribantur in planitía & </
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<
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echoid-s7563
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">ex media Proſorchas erigatur uti ſit ad
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normam que dicitur Gnomon & </
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<
s
xml:id
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echoid-s7564
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xml:space
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">a linea quæ erit planities in fine
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Gnomonis circum nouem ſpatia demetiantur. </
s
>
<
s
xml:id
="
echoid-s7565
"
xml:space
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">& </
s
>
<
s
xml:id
="
echoid-s7566
"
xml:space
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">quo loco none
<
lb
/>
paitis ſignum fuerit centrum conſtituatur ubi erit littera A. </
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>
<
s
xml:id
="
echoid-s7567
"
xml:space
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">& </
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>
<
s
xml:id
="
echoid-s7568
"
xml:space
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">de
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lb
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ducto circino ab eo centro ad lineam planitia ubi erit littera. </
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>
<
s
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="
echoid-s7569
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xml:space
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">B. </
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<
s
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="
echoid-s7570
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">cir
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cinatio circuli deſcribatur quæ dicitur meridiana. </
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>
<
s
xml:id
="
echoid-s7571
"
xml:space
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">Deinde ex nouẽ
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/>
partibus que ſunt in planitia ad Gnomonls centrum octo ſuman
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/>
tur & </
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>
<
s
xml:id
="
echoid-s7572
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xml:space
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">ſignentur in linea quæ eſt in planitia ubi erit littera. </
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<
s
xml:id
="
echoid-s7573
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="
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">C. </
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>
<
s
xml:id
="
echoid-s7574
"
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">hæc
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autem erit gnomonis æquinoctialis umbra. </
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>
<
s
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="
echoid-s7575
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xml:space
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">& </
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<
s
xml:id
="
echoid-s7576
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">ab eo ſigno & </
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>
<
s
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="
echoid-s7577
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">litte
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ra. </
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<
s
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="
echoid-s7578
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">C. </
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>
<
s
xml:id
="
echoid-s7579
"
xml:space
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">per centrum ubi eſt littera. </
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>
<
s
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="
echoid-s7580
"
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">A. </
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<
s
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="
echoid-s7581
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">linea perducatur ubi erit ſolis
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æquinoctialis radius. </
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>
<
s
xml:id
="
echoid-s7582
"
xml:space
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">T unc a centro deducto circino ad lineam
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/>
Planitiæ æquilatatio ſigtietur ubi erit littera e. </
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>
<
s
xml:id
="
echoid-s7583
"
xml:space
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">ſiniſteriori parte & </
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>
<
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="
echoid-s7584
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">
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/>
inde altiore in extremis lineis circinationis & </
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>
<
s
xml:id
="
echoid-s7585
"
xml:space
="
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">per centrum perducẽ
<
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/>
dum ut equa duo hemiciclia ſint diuiſa. </
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>
<
s
xml:id
="
echoid-s7586
"
xml:space
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">Hec autem linea a mathe
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/>
maticis dicitur Orizon. </
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>
<
s
xml:id
="
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xml:space
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">Deinde circinationis totius ſumẽda pars
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eſt. </
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<
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">xv. </
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<
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">& </
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<
s
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">circini cent℞ collocandum in linea circinationis. </
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>
<
s
xml:id
="
echoid-s7591
"
xml:space
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">Quo lo
<
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/>
ci ſecat eam lineam equinoctialis radius ubi erat littera.</
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>
<
s
xml:id
="
echoid-s7592
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">c. </
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<
s
xml:id
="
echoid-s7593
"
xml:space
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">& </
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>
<
s
xml:id
="
echoid-s7594
"
xml:space
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">ſignã
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/>
dum dextra ſiniſtra ubi ſunt littere. </
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>
<
s
xml:id
="
echoid-s7595
"
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">g. </
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>
<
s
xml:id
="
echoid-s7596
"
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">h. </
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>
<
s
xml:id
="
echoid-s7597
"
xml:space
="
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">Deinde ab his lineis uſ
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/>
ad lineam planitie perducende ſunt ubi erunt littere. </
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>
<
s
xml:id
="
echoid-s7598
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">t. </
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>
<
s
xml:id
="
echoid-s7599
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">r@ſta erit ſo
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/>
lis radius unus hiternus Alter æſtiuus Contra autem e littera. </
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>
<
s
xml:id
="
echoid-s7600
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">i.
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</
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<
s
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="
echoid-s7601
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">erie qui ſecat circinationem linee que eſt traiecta per cenerum ubi e
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runc littere. </
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<
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">I.</
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<
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">R.</
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">M. </
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<
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<
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">contra. </
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<
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<
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echoid-s7611
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">H. </
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<
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<
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echoid-s7613
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">I. </
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<
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echoid-s7614
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">L. </
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<
s
xml:id
="
echoid-s7615
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">& </
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<
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echoid-s7616
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tra.</
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<
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<
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<
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<
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">&</
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<
s
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">. A. </
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<
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">erit littera. </
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<
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echoid-s7623
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">N. </
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<
s
xml:id
="
echoid-s7624
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">T unc perducẽde ſunt diametro ab
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c.</
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<
s
xml:id
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echoid-s7625
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<
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xml:id
="
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">i. </
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<
s
xml:id
="
echoid-s7627
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">& </
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<
s
xml:id
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">ab. </
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<
s
xml:id
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">h. </
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<
s
xml:id
="
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">q̃ erit infe ior partis æſtiue ſuperior hibernæ eque
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diametro ſunt æque medie diuidende ubi erune littere. </
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<
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xml:id
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">O. </
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<
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">&</
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<
s
xml:id
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echoid-s7633
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">. P. </
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<
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<
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/>
Ibi centra ſignanda & </
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<
s
xml:id
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">per ea ſigna & </
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<
s
xml:id
="
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">centram. </
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<
s
xml:id
="
echoid-s7637
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">c. </
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>
<
s
xml:id
="
echoid-s7638
"
xml:space
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">linee ad ext emas
<
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/>
lineas circinationis ſunt perducendæ ubi erunt littere. </
s
>
<
s
xml:id
="
echoid-s7639
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xml:space
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">G. </
s
>
<
s
xml:id
="
echoid-s7640
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">P. </
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>
<
s
xml:id
="
echoid-s7641
"
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">T. </
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>
<
s
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="
echoid-s7642
"
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">
<
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/>
R. </
s
>
<
s
xml:id
="
echoid-s7643
"
xml:space
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">hæc erit linea Proſorchas radio equinoctiali. </
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>
<
s
xml:id
="
echoid-s7644
"
xml:space
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">Vocabitur autem
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/>
hæc linea mathematicis ratiõtbus Axon. </
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<
s
xml:id
="
echoid-s7645
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xml:space
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">& </
s
>
<
s
xml:id
="
echoid-s7646
"
xml:space
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">ab eiſdem cẽtris dedue
<
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/>
to circino ad extremas diametios deſcribantur hemTelclia. </
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>
<
s
xml:id
="
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">Quorũ
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/>
unum erit eſtiuum alterum h bernum. </
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<
s
xml:id
="
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"
xml:space
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">Deinde in quibus locis ſe
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cant linee paralellon & </
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>
<
s
xml:id
="
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xml:space
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">lineam que dicitur Orizon in dexteriore ꝑ
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/>
te exit liuera. </
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<
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xml:id
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">P. </
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<
s
xml:id
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">in ſiniſterioie. </
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<
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xml:id
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">T. </
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<
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="
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">& </
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<
s
xml:id
="
echoid-s7654
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">ab litteia: </
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>
<
s
xml:id
="
echoid-s7655
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">F. </
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<
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">ducatur </
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