Vitruvius
,
Marci Vitruvii Pollionis De architectura libri decem : ope codicis Guelferbytani, editionis principis, ceterorumque subsidiorum recensuit, et glossario in quo vocabula artis propria Germ. Ital. Gall. et Angl. explicantur
,
1800
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LIBER I. CAPUT VI.
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non deſideretur: </
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<
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xml:space
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">ſupraque ejus loci centrum medium, collocetur aeneus
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gnomon, indagator umbrae, qui Graece σκιαθήρας dicitur. </
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<
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xml:space
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meridianam circiter horam quintam, ſumenda eſt extrema gnomonis um-
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bra, et puncto ſignanda: </
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<
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xml:space
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">deinde circino diducto ad punctum, quod eſt gno-
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monis umbrae longitudinis ſignum, ex eoque a centro circumagenda linea
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rotundationis. </
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<
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xml:space
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">Itemque obſervanda poſtmeridiana iſtius gnomonis cres-
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cens umbra, et cum tetigerit circinationis lineam, et ſecerit parem ante-
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meridianae umbrae poſtmeridianam, ſignanda puncto. </
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<
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xml:space
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">Ex his duobus
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ſignis circino decuſſatim deſcribendum: </
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<
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xml:space
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">et per decuſſationem, et medium
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centrum linea perducenda ad extremum, ut habeatur meridiana et ſep-
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tentrionalis regio. </
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<
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xml:space
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">Tunc poſtea ſumenda eſt ſextadecima pars circinatio-
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nis lineae totius rotundationis, centrumque collocandum in meridiana
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linea, quae tangit circinationem, et ſignandum dextra ac ſiniſtra in circi-
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natione, et meridiana, et ſeptentrionali parte. </
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<
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xml:space
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">Tunc ex ſignis his qua-
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tuor, per centrum medium decuſſatim lineae ab extremis, ad extremas
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circinationes perducendae. </
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<
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xml:space
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partis deſignatio. </
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">Reliquae partes, dextra tres, et ſiniſtra tres his aequa-
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les, diſtribuendae ſunt in tota rotundatione, ut aequales diviſiones octo
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ventorum deſignatae ſint in deſcriptione: </
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ventorum regiones, et platearum, et angiportorum, videntur debere di-
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rigi deſcriptiones. </
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">His enim rationibus, et ea diviſione, excluſa erit ex
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habitationibus et vicis, ventorum vis moleſta. </
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directos ventos erunt conſormatae, ex aperto coeli ſpatio impetus ac ſlatus
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ſrequens, concluſus in ſaucibus angiportorum, vehementioribus viribus
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pervagabitur. </
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">Quas ob res convertendae ſunt ab regionibus ventorum,
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directiones vicorum, uti advenientes ad angulos inſularum, ſrangantur,
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repulſique diſſipentur. </
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mina noverunt, quod a nobis expoſitum ſit tantummodo octo eſſe ventos.
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