Vitruvius
,
M. Vitrvvivs Per Iocvndvm Solito Castigatior Factvs Cvm Figvris Et Tabvla Vt Iam Legi Et Intelligi Possit
,
1511
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<
description
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xml:space
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">Vmbræ gno
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monis.
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a. roma gno mo.ix. um-
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bra. viii.
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b. tarentum gnomo .xi.
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umbra. ix.
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c. athene gnomo. iiii.
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umbra. iii.
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d. rhodus gnomo. vii.
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umbra. v.
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e. alexandria gnomo. v.
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umbra. iii.
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poli
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f. alexandria gr. xxxvi.
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g. thodus gr. xxxvi.
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h. athene gr. xxxvii. &
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quartæ. i.
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i. tarentum gr. xxxix. &
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quartæ. iii.
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K. roma xxxxii.
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Gnomones
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a. gnomo mæ.
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b. athenarum
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c. rhodi
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d. tarenti
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e. alexandrie
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Quotiẽs me timur um-
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bras reduci
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mus gnomo
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nes ubi eft. a.
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& gnomo
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romæ</
description
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<
variables
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variables
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<
p
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<
s
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echoid-s3269
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xml:space
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">Ita in quibuſcun locis horologia erunt deſcribenda, eo loci ſumen-
<
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da eſt æquinoctialis vmbra, Et ſi erunt (quemadmodum romæ) gnomo
<
lb
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nis partes nouem, vmbræ octone, deſcribatur linea in planitia, & </
s
>
<
s
xml:id
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echoid-s3270
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xml:space
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">ex me
<
lb
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dia πρὸςὸρθὰς erigatur vti ſit ad norman, quæ dicitur gnomon, & </
s
>
<
s
xml:id
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echoid-s3271
"
xml:space
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preserve
">a li-
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lb
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nea quæ erit planities in finem gnomonis, circino nouem ſpacia dimeti
<
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antur, & </
s
>
<
s
xml:id
="
echoid-s3272
"
xml:space
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preserve
">quo loco nonæ partis ſignum fuerit, centrum conſtituatur, vbi
<
lb
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erit littera. </
s
>
<
s
xml:id
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echoid-s3273
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xml:space
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">a. </
s
>
<
s
xml:id
="
echoid-s3274
"
xml:space
="
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">& </
s
>
<
s
xml:id
="
echoid-s3275
"
xml:space
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">diducto circino ab eo centro ad lineam planitiæ vbi erit
<
lb
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littera. </
s
>
<
s
xml:id
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echoid-s3276
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xml:space
="
preserve
">b. </
s
>
<
s
xml:id
="
echoid-s3277
"
xml:space
="
preserve
">circinatio circuli deſcribatur, quæ dicitur, meridiana, Deĩde ex
<
lb
/>
nouem partibus, quæ ſunt a planitia ad gnomonis centrum, octo ſumã
<
lb
/>
tur & </
s
>
<
s
xml:id
="
echoid-s3278
"
xml:space
="
preserve
">ſignentur in linea quæ eſt in planitia, ubi erit littera .</
s
>
<
s
xml:id
="
echoid-s3279
"
xml:space
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">c. </
s
>
<
s
xml:id
="
echoid-s3280
"
xml:space
="
preserve
">Hæc autem
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lb
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erit gnomonis æquinoctialis umbra, & </
s
>
<
s
xml:id
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echoid-s3281
"
xml:space
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preserve
">ab eo ſigno & </
s
>
<
s
xml:id
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xml:space
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">littera .</
s
>
<
s
xml:id
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echoid-s3283
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xml:space
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">c. </
s
>
<
s
xml:id
="
echoid-s3284
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xml:space
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">per cẽtrũ
<
lb
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ubi eſt littera. </
s
>
<
s
xml:id
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echoid-s3285
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xml:space
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">a. </
s
>
<
s
xml:id
="
echoid-s3286
"
xml:space
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preserve
">linea perducatur, ubi erit ſolis æquinoctialis radius, Tũc
<
lb
/>
ab centto diducto circino ad lineã planitiæ æquilatatio ſignetur ubi erit
<
lb
/>
littera. </
s
>
<
s
xml:id
="
echoid-s3287
"
xml:space
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">e. </
s
>
<
s
xml:id
="
echoid-s3288
"
xml:space
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">ſiniſteriore parte, &</
s
>
<
s
xml:id
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echoid-s3289
"
xml:space
="
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">. i. </
s
>
<
s
xml:id
="
echoid-s3290
"
xml:space
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">dexteriore in extremis lineis circinatio -
<
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nis, & </
s
>
<
s
xml:id
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echoid-s3291
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xml:space
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">per centrum perducenda linea, vt æqua duo hemicyclia ſint diui
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ſa. </
s
>
<
s
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xml:space
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">Hæc autem linea a mathematicis dicitur orizon. </
s
>
<
s
xml:id
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echoid-s3293
"
xml:space
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">Deinde circinationis
<
lb
/>
totius ſumenda pars eſt quintadecima & </
s
>
<
s
xml:id
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echoid-s3294
"
xml:space
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preserve
">circini centrum collocandum
<
lb
/>
ĩlinea circinatiõis, Quo loci ſecat eam lineam æquinoctialis radius, </
s
>
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