Vitruvius Pollio, I dieci libri dell?architettura, 1567

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    <archimedes>
      <text>
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              <subchap2>
                <p type="main">
                  <s id="s.006912">
                    <pb pagenum="377" xlink:href="045/01/391.jpg"/>
                    <figure id="id.045.01.391.1.jpg" xlink:href="045/01/391/1.jpg" number="115"/>
                  reno in una. </s>
                  <figure id="id.045.01.391.2.jpg" xlink:href="045/01/391/2.jpg" number="116"/>
                  <s id="s.006931">Ma nelle lunghezze mezane proportionalmen­
                    <lb/>
                  te è grandiſſimo, & ne i punti dal giogo egualmente distanti
                    <lb/>
                  ſono gli agguagliamenti eguali, & tanto maggiori, quanto
                    <lb/>
                  ſono piu uicini alla lunghezza piu lunga. </s>
                  <s id="s.006932">Il mezano moui­
                    <lb/>
                  mento adunque dal principio dello Ariete, ſecondo l'ordine
                    <lb/>
                  de i ſegni, ſe ne ua fin alla linea del mezano mouimento, ſi
                    <lb/>
                  come il uero mouimento è fin alla linea del uero mouimen­
                    <lb/>
                  to: d'indi cominciando ſi conduce: la doue lo argomento del Sole, o quello arco del zo­
                    <lb/>
                  diaco, che è intercetto dalla linea del giogo dello eccentrico ſecondo l'ordine de i ſegni, & la li­
                    <lb/>
                  nea del mezano mouimento; & è coſi chiamato, perche da quello ſi argomenta l'angulo dello ag
                    <lb/>
                  guagliamento, il che quando è nel ſemicircolo inferiore, la linea del mezano mouimento, ua
                    <lb/>
                  inanzi la linea del uero: ma quando paſſa il ſemicircolo, allhora precede la linea del mezano mo
                    <lb/>
                  uimento. </s>
                  <s id="s.006933">& però di ſopra ſi ſottragge, & qui ſi aggiugne al mezano mouimento, accioche ſi
                    <lb/>
                  poſſa cauare il uero mouimento. </s>
                  <s id="s.006934">ma per hora laſcierò, che il lettore ricorra al Maurolico, che
                    <lb/>
                  pur troppo mi pare hauere l'altrui opra operato, biſogna bene auuertire di porre in qualche prin
                    <lb/>
                  cipio la radice del mezano mouimento, ſopra la quale egli ſi poſſa in quello inſtante, che uole-
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.006935">
                    <emph type="italics"/>
                  a b g. lo eccentrico d. il ſuo centro.
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.006936">
                    <emph type="italics"/>
                  e. il centro del mondo.
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.006937">
                    <emph type="italics"/>
                  a d g. la linea del giogo.
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.006938">
                    <emph type="italics"/>
                  b. il centro del ſole.
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.006939">
                    <emph type="italics"/>
                  e z. </s>
                  <s id="s.006940">la linea del mezano mouimento parallela alla li­
                    <lb/>
                  nea b d.
                    <emph.end type="italics"/>
                    <emph type="italics"/>
                  e h. la linea del uero mouimento.
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.006941">
                    <emph type="italics"/>
                  b e z. </s>
                  <s id="s.006942">angolo è l'equatione.
                    <emph.end type="italics"/>
                  </s>
                </p>
                <figure id="id.045.01.391.3.jpg" xlink:href="045/01/391/3.jpg" number="117"/>
                <p type="main">
                  <s id="s.006943">
                    <emph type="italics"/>
                  mo calculare il mezano mouimento del ſole. </s>
                  <s id="s.006944">Da queſta
                    <lb/>
                  radice ſi ua oſſeruando il uero mouimento, ſecondo la ſcien
                    <lb/>
                  za de i triangoli piani. </s>
                  <s id="s.006945">Imperoche da tre linee, che lega
                    <lb/>
                  no tre centri cioè quello del mondo, quello del deferente,
                    <lb/>
                  & quello del ſole tre angoli ſi uedeno nel triangolo da eſſer
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.006946">
                    <emph type="italics"/>
                  a b g. il concentrico d. il ſuo centro.
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.006947">
                    <emph type="italics"/>
                  t z. </s>
                  <s id="s.006948">lo eccentrico h. il ſuo centro.
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.006949">
                    <emph type="italics"/>
                  e z. </s>
                  <s id="s.006950">lo epiciclo g. il ſuo centro.
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.006951">
                    <emph type="italics"/>
                  d h. & g z. </s>
                  <s id="s.006952">eguali.
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.006953">
                    <emph type="italics"/>
                  d z. </s>
                  <s id="s.006954">parallelogrammo.
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.006955">
                    <emph type="italics"/>
                  Il mouimento.
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.006956">
                    <emph type="italics"/>
                  del concentrico a d g.
                    <emph.end type="italics"/>
                    <emph type="italics"/>
                  del epiciclo. </s>
                </p>
                <p type="main">
                  <s id="s.006957">e g z.
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.006958">
                    <emph type="italics"/>
                  dello eccentrico t h z. </s>
                  <s id="s.006959">ouero t d g.
                    <emph.end type="italics"/>
                    <emph type="italics"/>
                  del giogo dello eccentrico a d z.
                    <emph.end type="italics"/>
                    <emph type="italics"/>
                  Gli angoli t h z. </s>
                </p>
                <p type="main">
                  <s id="s.006960">& e g z. </s>
                  <s id="s.006961">ſono eguali.
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.006962">
                    <emph type="italics"/>
                  L'angolo a d g. eguale a gli angoli.
                    <emph.end type="italics"/>
                  </s>
                </p>
                <p type="main">
                  <s id="s.006963">
                    <emph type="italics"/>
                  a d t.
                    <emph.end type="italics"/>
                    <emph type="italics"/>
                  t d g.
                    <emph.end type="italics"/>
                    <emph type="italics"/>
                  formato, l'uno è l'angolo dello agguagliamento, gli altri due ſono quelli, che formano le due li-
                    <emph.end type="italics"/>
                  </s>
                </p>
              </subchap2>
            </subchap1>
          </chap>
        </body>
      </text>
    </archimedes>