Vitruvius Pollio, I dieci libri dell?architettura, 1567
page |< < of 520 > >|
    <archimedes>
      <text>
        <body>
          <chap>
            <subchap1>
              <subchap2>
                <p type="main">
                  <s id="s.007653">
                    <pb pagenum="413" xlink:href="045/01/427.jpg"/>
                    <emph type="italics"/>
                  no. </s>
                  <s id="s.007654">Diuiderai adunque la portione del circolo del tropico compreſa da i f
                    <emph.end type="italics"/>
                  7
                    <emph type="italics"/>
                  ſopra l'orizonte
                    <lb/>
                  in dodici parti eguali, & ſimilmente la portione i g
                    <emph.end type="italics"/>
                  7
                    <emph type="italics"/>
                  in dodici parti eguali & nel punto.
                    <emph.end type="italics"/>
                  1.
                    <lb/>
                    <emph type="italics"/>
                  ſegna
                    <emph.end type="italics"/>
                  12.
                    <emph type="italics"/>
                  & tanto di ſopra i quanto di ſotto nella prima diuiſione ſegna
                    <emph.end type="italics"/>
                  11.
                    <emph type="italics"/>
                  nella ſeconda
                    <emph.end type="italics"/>
                    <lb/>
                  10,
                    <emph type="italics"/>
                  nella terza
                    <emph.end type="italics"/>
                  9.
                    <emph type="italics"/>
                  nella quarta.
                    <emph.end type="italics"/>
                  8.
                    <emph type="italics"/>
                  nella quinta.
                    <emph.end type="italics"/>
                  7.
                    <emph type="italics"/>
                  nella ſesta, la doue ſono le lettere. </s>
                  <s id="s.007655">f.
                    <lb/>
                  & g.
                    <emph.end type="italics"/>
                  6.
                    <emph type="italics"/>
                  nella ſettima
                    <emph.end type="italics"/>
                  5.
                    <emph type="italics"/>
                  nella ottaua
                    <emph.end type="italics"/>
                  4.
                    <emph type="italics"/>
                  nella nona
                    <emph.end type="italics"/>
                  3.
                    <emph type="italics"/>
                  nella decima
                    <emph.end type="italics"/>
                  2.
                    <emph type="italics"/>
                  nella undecima.
                    <emph.end type="italics"/>
                  1.
                    <lb/>
                    <emph type="italics"/>
                  & a queſto modo hauerai partito le portioni del circolo del tropico. </s>
                  <s id="s.007656">nè ti deue mouere, che la
                    <lb/>
                  portione
                    <emph.end type="italics"/>
                  1
                    <emph type="italics"/>
                  g
                    <emph.end type="italics"/>
                  7
                    <emph type="italics"/>
                  che è ſotto l'orizonte, ci ſerua per la diuiſione del minor giorno, perche ſe la
                    <lb/>
                  conſidererai come portione del tropico del Capricorno, uederai la diuiſione eſſer giuſta, perche la
                    <lb/>
                  portione della notte della eſtate è ſimile alla portione del giorno del uerno, con ſimile ragione po­
                    <lb/>
                  trai trarre dallo Analemma i cicorli intieri de i ſegni, & diuiderli come hai fatto il circolo del
                    <lb/>
                  Tropico, & uederai in ogni ſegno quanto ſia lungo il giorno, ſe uorrai ſegnare altra ſorte di hore,
                    <lb/>
                  che le antiche, come ſi uederà di ſotto. </s>
                  <s id="s.007657">Diuiſo adunque il circolo del tropico al modo ſopradet­
                    <lb/>
                  to, biſogna da ciaſcuna diuiſione fatta nella circonferenza far cadere linee ad anguli dritti ſopra
                    <lb/>
                  il diametro f g. per dimostrare anche i tagli delle portioni delle hore nel piano. </s>
                  <s id="s.007658">però da
                    <emph.end type="italics"/>
                  11.
                    <lb/>
                    <emph type="italics"/>
                  &
                    <emph.end type="italics"/>
                  1.
                    <emph type="italics"/>
                  caderà una linea al diametro f g. ne i punti
                    <emph.end type="italics"/>
                  11.
                    <emph type="italics"/>
                  &
                    <emph.end type="italics"/>
                  1.
                    <emph type="italics"/>
                  & da
                    <emph.end type="italics"/>
                  10
                    <emph type="italics"/>
                  &
                    <emph.end type="italics"/>
                  2.
                    <emph type="italics"/>
                  ne cade­
                    <lb/>
                  rà un'altra ne i punti
                    <emph.end type="italics"/>
                  10
                    <emph type="italics"/>
                  &
                    <emph.end type="italics"/>
                  2.
                    <emph type="italics"/>
                  corriſpondenti. </s>
                  <s id="s.007659">& coſi di mano in mano fin che ſarà partito
                    <emph.end type="italics"/>
                    <lb/>
                    <figure id="id.045.01.427.1.jpg" xlink:href="045/01/427/1.jpg" number="128"/>
                  </s>
                </p>
              </subchap2>
            </subchap1>
          </chap>
        </body>
      </text>
    </archimedes>
Impressum