Vitruvius, I Dieci Libri dell' Architettvra di M. Vitrvvio, 1556

List of thumbnails

< >
141
141 (126) 		142
142 (127)
143
143 (128) 		144
144 (129)
145
145 (130) 		146
146 (131)
147
147 (132) 		148
148 (133)
149
149 (132) 		150
150 (133)
< >
page |< < (235) of 325 > >|
    <echo version="1.0RC">
      <text xml:lang="it" type="free">
        <div xml:id="echoid-div681" type="section" level="1" n="119">
          <p style="it">
            <s xml:id="echoid-s20043" xml:space="preserve">
              <pb o="235" file="0245" n="254" rhead="NONO."/>
            perficie ė piana fa uno effetto, ſe caua un’ altro, ſe curua un’ altra, ſe dritta un’ altro, & </s>
            <s xml:id="echoid-s20044" xml:space="preserve">coſi in qualunque ſoperficie, che cade il raggio ſolare
              <lb/>
            ſi uede mirbile mutatione di effetti, iquali per ragione di proſpettiua ſi poſſono diuinamente conoſcere, & </s>
            <s xml:id="echoid-s20045" xml:space="preserve">diſſegnare, & </s>
            <s xml:id="echoid-s20046" xml:space="preserve">con alcum ſtrumenti
              <lb/>
            fatti à queſto effetto chiar amente porre dinanzi à gli occhi. </s>
            <s xml:id="echoid-s20047" xml:space="preserve">Conuengono ancho tutti gli Horologi, che tutte le linee delle hore ſiano quali ſi
              <lb/>
            uoglia, ò dal Meriggie, ò dall’Occaſo, ò dall’Orto pigliate, tutte dico concorrono con i termini delle hore ſignate ſu l’Equinottiale, & </s>
            <s xml:id="echoid-s20048" xml:space="preserve">ogni
              <lb/>
            Horologio ci moſtra la quantita del giorno, il uero Meriggie con certi, & </s>
            <s xml:id="echoid-s20049" xml:space="preserve">determinati termini, & </s>
            <s xml:id="echoid-s20050" xml:space="preserve">ſe ſono con il loro Analemmi deſcritti, ci
              <lb/>
            moſtrano ancho in che grado, & </s>
            <s xml:id="echoid-s20051" xml:space="preserve">in che ſegno ſi troua il Sole. </s>
            <s xml:id="echoid-s20052" xml:space="preserve">Ma hora uegnamo à Vitr.</s>
            <s xml:id="echoid-s20053" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div687" type="section" level="1" n="120">
          <head xml:id="echoid-head120" xml:space="preserve">CAP. IX. DELLA RAGIONE, ET VSO DE GLI HOROLOGI, ET DELLA
            <lb/>
          LORO INVENTIONE, ET DE GLI INVENTORI.</head>
          <note position="left" xml:space="preserve">10</note>
          <p>
            <s xml:id="echoid-s20054" xml:space="preserve">EGLI ſi dice, che Beroſo Caldeo ritrouò l’Horologio, che ſi caua da un quadrato d’un Semicircolo,
              <lb/>
            che ſi ſeruiua ad un clima ſolo.</s>
            <s xml:id="echoid-s20055" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s20056" xml:space="preserve">Queſto Horologio ſi fa in queſto modo. </s>
            <s xml:id="echoid-s20057" xml:space="preserve">Pigliaſi dallo Analemma la linea Equinottiale, & </s>
            <s xml:id="echoid-s20058" xml:space="preserve">ſia a c laqual ſia tagliata nel
              <lb/>
            mezzo ad anguli giuſti nel punto b. </s>
            <s xml:id="echoid-s20059" xml:space="preserve">dalla linea detta Lacotomus qui ſia d.</s>
            <s xml:id="echoid-s20060" xml:space="preserve">e, aquale con gli eſtremi ſuoi dimoſtr a i termi-
              <lb/>
            ni de i Tropichi. </s>
            <s xml:id="echoid-s20061" xml:space="preserve">Siano ancho tirate due linee per gli eſtremi della linea Lacotomus, cioe i Diametri de, i, Tropici dello
              <lb/>
            Analemma, f g. </s>
            <s xml:id="echoid-s20062" xml:space="preserve">& </s>
            <s xml:id="echoid-s20063" xml:space="preserve">h i. </s>
            <s xml:id="echoid-s20064" xml:space="preserve">è tanto la Equinottiole, quanto i detti Diametri ſian tirate in luogo. </s>
            <s xml:id="echoid-s20065" xml:space="preserve">Oltra di queſto ſian tirate
              <lb/>
            le altre linee, che ſono i Semidiametri de gli altri ſegni, cauate dal circolo detto Monachus, & </s>
            <s xml:id="echoid-s20066" xml:space="preserve">coſi fin qui haueremo ſette linee paralelle, una
              <lb/>
            dell’ Equinottiale nel mezzo, due de i Tropici ſu gli eſtremi, & </s>
            <s xml:id="echoid-s20067" xml:space="preserve">due per una parte, tra l’Equinottiale, & </s>
            <s xml:id="echoid-s20068" xml:space="preserve">i Tropici, una del Toro, l’altra de i
              <lb/>
            Gemelli, da una parte, & </s>
            <s xml:id="echoid-s20069" xml:space="preserve">l’una dello Scorpione, & </s>
            <s xml:id="echoid-s20070" xml:space="preserve">l’altra del Sagittario dall’altra, & </s>
            <s xml:id="echoid-s20071" xml:space="preserve">la Equinottiale ſeruira al Montone, & </s>
            <s xml:id="echoid-s20072" xml:space="preserve">alla Bilancia,
              <lb/>
            quella del Toro alla Vergine, quella de’ Gemelli al Leone, quella dello Scorpione à Peſci, quella del Sagittario allo Acquario, ma cõ ordine con
              <lb/>
              <note position="left" xlink:label="note-0245-02" xlink:href="note-0245-02a" xml:space="preserve">20</note>
            trario, hauute queſte linee tratte dal circolo de i meſi, & </s>
            <s xml:id="echoid-s20073" xml:space="preserve">hauuta la Meridiana tratta dalla linea Lacotomus. </s>
            <s xml:id="echoid-s20074" xml:space="preserve">Sapemo, che dalla Equinottiale
              <lb/>
            al Tropico ci ſono 23 gradi è mezzo, di queſti ne piglieremo nouanta, & </s>
            <s xml:id="echoid-s20075" xml:space="preserve">i riporteremo ſopra lo Equinottiale, cioe 90 da una parte, & </s>
            <s xml:id="echoid-s20076" xml:space="preserve">90
              <lb/>
            dall’ altra della linea Meridiana, & </s>
            <s xml:id="echoid-s20077" xml:space="preserve">queſte 90 parti da una banda diuideremo in ſei parti, cioe ogni 15 gradi faremo un ſegno. </s>
            <s xml:id="echoid-s20078" xml:space="preserve">& </s>
            <s xml:id="echoid-s20079" xml:space="preserve">coſi dall’al-
              <lb/>
            tra di modo, che l’Equinottiale ſer à diuiſo in 12 parti eguali, che rappreſentano dodici hore. </s>
            <s xml:id="echoid-s20080" xml:space="preserve">Similmẽte diuideremo i Diametri de i Tropici, ma
              <lb/>
            in modo, che l’arco del Soleſtitio ſia maggiore, & </s>
            <s xml:id="echoid-s20081" xml:space="preserve">l’arco della Bruma minore, cioè quello, che auãza dell’arco dello Solstitio ſopra l’Orizonte,
              <lb/>
            ſia diuiſo in 12 parti eguali, & </s>
            <s xml:id="echoid-s20082" xml:space="preserve">coſi quello, che auãza dell’ arco della Bruma ſopra l’Orizonte ſia diuiſo in 12 parti eguali, certo è che, le parti
              <lb/>
            dell’ arco del Solſtitio auãzerãno le parti dell’ arco della Bruma, perche quello è maggior arco ſopra l’Orizõte, che queſto, diuideremo adũque
              <lb/>
            quest’ archi, ò gli Semidiametri in 12 parti proportionate, & </s>
            <s xml:id="echoid-s20083" xml:space="preserve">ſei ſerãno di quà, ſei di là dalla linea Lacotomus, et quelle parti, che auanzerãno,
              <lb/>
            de i Tropici, & </s>
            <s xml:id="echoid-s20084" xml:space="preserve">dello Equinottiale oltra le dodici, ſerãno tagliate uia, & </s>
            <s xml:id="echoid-s20085" xml:space="preserve">i punti delle diuiſioni in queſte tre linee paralelle, cioè dello Equinott a
              <lb/>
            le, et de i Tropici ſeranno congiunti con linee ordinatamente, di modo che’l primo punto dopo la Meridiana del Tropico del Solstitio ſer à con
              <lb/>
              <note position="left" xlink:label="note-0245-03" xlink:href="note-0245-03a" xml:space="preserve">30</note>
            il primo ſopra l’Equinottiale, & </s>
            <s xml:id="echoid-s20086" xml:space="preserve">col primo ſopra l’altro Tropico con una linea congiunti, & </s>
            <s xml:id="echoid-s20087" xml:space="preserve">tutti i ſecondi punti, & </s>
            <s xml:id="echoid-s20088" xml:space="preserve">i terzi, & </s>
            <s xml:id="echoid-s20089" xml:space="preserve">i quarti, & </s>
            <s xml:id="echoid-s20090" xml:space="preserve">
              <lb/>
            gli altri per ordine ſeranno in una iſteſſa linea, & </s>
            <s xml:id="echoid-s20091" xml:space="preserve">coſi ſeranno ſegnate le hore diſſeguali, fatto questo, egli ſi uolgera quella lametta, doue ſe-
              <lb/>
            ran diſſegnate queſte coſe, d’intorno ad una forma di colonna di modo, che lo Equinottiale faccia un Semicircolo giuſto, certo è, che la linea del
              <lb/>
            Solſtitio paſſer à il Semicircolo, & </s>
            <s xml:id="echoid-s20092" xml:space="preserve">la linea della Bruma ſer à minore del Semicircolo: </s>
            <s xml:id="echoid-s20093" xml:space="preserve">Piegata adunque è riuolta queſta lametta, ſi fara un qua-
              <lb/>
            dretto per fetto di qualche materia atta à queſto, & </s>
            <s xml:id="echoid-s20094" xml:space="preserve">in uno angulo de gli inferiori ſi ponera il piede della ſeſta, & </s>
            <s xml:id="echoid-s20095" xml:space="preserve">ſi fara una quarta di circolo
              <lb/>
            ſopra un lato di eſſo quadrato, & </s>
            <s xml:id="echoid-s20096" xml:space="preserve">dal piano doue ella comincia, ſi cominciera à diuidere in parti 90, & </s>
            <s xml:id="echoid-s20097" xml:space="preserve">la doue ſer à l’altezza del Sole Meri-
              <lb/>
            diana Equinottiale di quel clima, per lo quale è fatto l’Horologio ſi fara un ſegno, & </s>
            <s xml:id="echoid-s20098" xml:space="preserve">à quello dal centro ſi tirera una linea, & </s>
            <s xml:id="echoid-s20099" xml:space="preserve">longo quella li-
              <lb/>
            nea ſi fara un taglio nel detto quadrato, che leuera di eſſo da una parte, & </s>
            <s xml:id="echoid-s20100" xml:space="preserve">l’altra tanto quanto moſtrera quella linea, & </s>
            <s xml:id="echoid-s20101" xml:space="preserve">coſi tagliato quel
              <lb/>
            quadrato, ſe ui ponera ſopra la lametta piegata e ritorta, appoggiata à quella ſoperficie, che rester a del taglio, & </s>
            <s xml:id="echoid-s20102" xml:space="preserve">nel mezzo ſi ponera lo ſti-
              <lb/>
            le ad anguli dritti tanto longo, quanto è il Semidiametro dello Equinottiale, & </s>
            <s xml:id="echoid-s20103" xml:space="preserve">fornito l’Horologio uolendclo uſare, egli ſi ponera uolto al Me
              <lb/>
              <note position="left" xlink:label="note-0245-04" xlink:href="note-0245-04a" xml:space="preserve">40</note>
            riggie con la linea Meridiana, & </s>
            <s xml:id="echoid-s20104" xml:space="preserve">la punta dello ſtile dimoſtrera al Sole le hore, che dalla deſtra ſopra uno eſtremo ſi comincieranno à ſegna-
              <lb/>
            re da una fin à 12. </s>
            <s xml:id="echoid-s20105" xml:space="preserve">& </s>
            <s xml:id="echoid-s20106" xml:space="preserve">la ſesta hora ſera ſu la Meridiana, & </s>
            <s xml:id="echoid-s20107" xml:space="preserve">la Figura è la ſottopoſta, con un’altra Figura, che per ornamento, e, bellezza ha-
              <lb/>
            uemo fatto, dimoſtrando come egli ſi poſſa uariare, ſeruando la regola, & </s>
            <s xml:id="echoid-s20108" xml:space="preserve">la forma de gli Horologi. </s>
            <s xml:id="echoid-s20109" xml:space="preserve">hauemo ancho ſegnato le hore, che comin-
              <lb/>
            ciano dal mezzodì, & </s>
            <s xml:id="echoid-s20110" xml:space="preserve">diſtinte con i numeri, perche i numeri grandi dimoſtrano le hore diſſeguali, i piccioli dimoſtr ano le hore Eguali.</s>
            <s xml:id="echoid-s20111" xml:space="preserve"/>
          </p>
          <figure number="136">
            <variables xml:id="echoid-variables58" xml:space="preserve">b ♋ ♌ ♍ 5 ♎ XI ♏ 6 a ♐ 7 X f 8 IX 9 VIII 10 11 VII d 12 b VI e 1 V 2 IIII 3 III 4 II g ♑ ♋ ♒ 5 ♓ 6 C I ♈ ♉ ♊ l ♋</variables>
          </figure>
          <figure number="137">
            <image file="0245-02" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/0245-02"/>
          </figure>
        </div>
      </text>
    </echo>
Impressum