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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        <div xml:id="echoid-div129" type="section" level="1" n="71">
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            <s xml:id="echoid-s2825" xml:space="preserve">
              <pb o="148" file="0172" n="172" rhead="M. VITRUVII P. DE ARCHITECTURA"/>
            tum, ad vetuſtatem ea erunt ſine dubitatione firma. </s>
            <s xml:id="echoid-s2826" xml:space="preserve">Sin autem hypogea
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            concamerationesque inſtituentur, ſundationes eorum fieri debent craſſiores,
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            quam quae in ſuperioribus aedificiis ſtructurae ſunt ſuturae, eorumque
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            parietes, pilae, columnae ad perpendiculum inſeriorum medio collocen-
              <lb/>
            tur, uti ſolido reſpondeant. </s>
            <s xml:id="echoid-s2827" xml:space="preserve">Nam ſi in pendentibus onera ſuerint parietum
              <lb/>
            aut columnarum, non poterunt habere perpetuam ſirmitatem: </s>
            <s xml:id="echoid-s2828" xml:space="preserve">praeterea
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            inter limina ſecundum pilas et antas, poſtes ſi ſupponentur, erunt non
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            vitioſae. </s>
            <s xml:id="echoid-s2829" xml:space="preserve">Limina enim et trabes ſtructuris cum ſint oneratae medio ſpa-
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            tio pandantes, ſrangunt ſua lyſi ſtructuras. </s>
            <s xml:id="echoid-s2830" xml:space="preserve">Cum autem ſubjecti ſuerint
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            et ſubcuneati poſtes, non patiuntur inſidere trabes, neque eas laedere.
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            </s>
            <s xml:id="echoid-s2831" xml:space="preserve">Item adminiſtrandum eſt, uti levent onus parietum fornicationes, cuneo-
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            rum diviſionibus et ad centrum reſpondentes earum concluſurae. </s>
            <s xml:id="echoid-s2832" xml:space="preserve">Cum
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            enim extra trabes, aut liminum capita arcus cuneis erunt concluſi; </s>
            <s xml:id="echoid-s2833" xml:space="preserve">pri-
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            mum non pandabit materies levata onere; </s>
            <s xml:id="echoid-s2834" xml:space="preserve">deinde ſi quod e vetuſtate vi-
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            tium coeperit, ſine molitione ſulturarum ſaciliter mutabitur. </s>
            <s xml:id="echoid-s2835" xml:space="preserve">Itemque
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            quae pilatim aguntur aediſicia, et cuneorum diviſionibus, coagmentis ad
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            centrum reſpondentibus, ſornices concluduntur. </s>
            <s xml:id="echoid-s2836" xml:space="preserve">Extremae pilae in his
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            latiores ſpatio ſunt ſaciundae, uti vires eae habentes reſiſtere poſſint, cum
              <lb/>
            cunei ab oneribus parietum preſſi, per coagmenta ad centrum ſe premen-
              <lb/>
            tes extruderint incumbas, Itaque ſi angulares pilae erunt ſpatioſis ma-
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            gnitudinibus, continendo cuneos ſirmitatem operibus praeſtabunt. </s>
            <s xml:id="echoid-s2837" xml:space="preserve">Cum
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            in his rebus animadverſum fuerit, uti ea diligentia in his adhibeatur,
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            non minus etiam obſervandum eſt uti omnes ſtructurae perpendiculo re-
              <lb/>
            ſpondeant, neque habeant in ulla parte proclinationes. </s>
            <s xml:id="echoid-s2838" xml:space="preserve">Maxima autem
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            eſſe debet cura ſubſtructionum, quod in his infinita vitia ſolet facere
              <lb/>
            terrae congeſtio. </s>
            <s xml:id="echoid-s2839" xml:space="preserve">Ea enim non poteſt eſſe ſemper uno pondere, quo ſo-
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            let eſſe per aeſtatem, ſed hibernis temporibus, recipiendo ex imbribus
              <lb/>
            aquae multitudinem, creſcens et pondere, et amplitudine, disrumpit et
              <lb/>
            extrudit ſtructurarum ſeptiones. </s>
            <s xml:id="echoid-s2840" xml:space="preserve">Itaque ut huic vitio medeatur, ſic </s>
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