Alberti, Leone Battista, De re aedificatoria, 1485

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    <archimedes>
      <text>
        <body>
          <chap id="N40001A">
            <p id="N408F83" type="main">
              <s id="N409267">
                <pb xlink:href="004/01/198.jpg"/>
              ſtitate numero atque craſſitudine et robore
                <expan abbr="frequẽtes">frequentes</expan>
              firmi
                <lb/>
              coæquales nuſquam ſcabri
                <expan abbr="nuſq̃">nuſquam</expan>
              iuncturis
                <expan abbr="ĩterrupti">interrupti</expan>
              inter ca
                <lb/>
              rinam atque uadum medium quippiam eſſe oportet: quo
                <lb/>
              id iter lubricum reddatur. </s>
              <s id="N40928B">Lubricant ſapone aut ſepo aut
                <lb/>
              amurca / aut madente fortaſſis lotura cretæ. </s>
              <s id="N409290">Eſt et aliud
                <expan abbr="lubricãdi">lu
                  <lb/>
                bricandi</expan>
              genus quod fit
                <expan abbr="chilĩdris">chilindris</expan>
                <expan abbr="ĩ">in</expan>
                <expan abbr="trãſuerſũ">tranſuerſum</expan>
              ſubſtitutis. </s>
              <s id="N4092A4">Hic
                <lb/>
              ſi erunt numero complures / difficile ad lineas equi diſtan
                <lb/>
              tes atque diſtinatiores pro itinere agendo directos coapta
                <lb/>
              buntur: quod omnino neceſſe eſt fieri ne perturbent atque
                <lb/>
              ſubradant: ponduſque in alteram partem uehant: ſed una
                <lb/>
              conſpiratione in officio ſubſequantur. </s>
              <s id="N4092B1">Si
                <expan abbr="erũt">erunt</expan>
              numero pau
                <lb/>
              ciores: illic quidem aut ſub pondere deficientes fatiſcent:
                <lb/>
              ac reſoluti remorabuntur: aut qua una linea ſubſtratam ua
                <lb/>
              di ſuperficiem: qua ue altera item una linea ſuper
                <expan abbr="impoſitã">impoſitam</expan>
                <lb/>
              ponderis carinam attingunt quaſi acie penetrando infigen
                <lb/>
              tur / atque hærebunt chilindri corpus coæqualibus circulis
                <lb/>
              compluribus altero alteris congeſtis. </s>
              <s id="N4092C8">Conſtat et circulum
                <lb/>
              apud mathemathicos aſſeritur rectam non poſſe lineam
                <lb/>
              puncto plus uno attingere. </s>
              <s id="N4092CF">Hinc nos chilindri aciem appel
                <lb/>
              lamus lineam / quam unicam pondus ex chylindro premat.
                <lb/>
              </s>
              <s id="N4092D5">Iſtis prouidebitur materie denſitate / et linearum notatione
                <lb/>
              ad normam atque directione. </s>
              <s id="N4092DA">Sed quom præter hæc etiam
                <lb/>
              ſunt quæ uſu comprobentur. </s>
              <s id="N4092DF">Rotæ / trocleæ / coclea / atque
                <lb/>
              uectes: de his accuratius tractandum eſt. </s>
              <s id="N4092E4">Sunt enim rotæ
                <lb/>
              uolgulis multa ex parte ſimiles. </s>
              <s id="N4092E9">Semper enim unicum in
                <lb/>
              punctum premunt ex
                <expan abbr="ppẽdiculari">perpendiculari</expan>
              . </s>
              <s id="N4092F2">Sed hoc intereſt quod rotu
                <lb/>
              li expeditiores ſunt: rotæ axium interfrictione tardantur.
                <lb/>
              </s>
              <s id="N4092F8">Rotæ partes ſunt tris: ambiens extremus ampliſſimus lim
                <lb/>
              bus circuli: medius axis: et circulus is in quo axis induca
                <lb/>
              tur quaſi in armilla. </s>
              <s id="N4092FF">Id alii fortaſſis polum appellarent /
                <lb/>
              nos quod in aliis machinis ſtet / in aliis uero moueat: ſi ita
                <lb/>
              licet: axe clam nuncupabimus. </s>
              <s id="N409306">Rota ſi axe uoluetur craſ
                <lb/>
              ſo: durius prolabetur: ſi tenui / pondera non tolerabit.
                <lb/>
              </s>
              <s id="N40930C">Rotarum extremus ambitus ſi breuis: quod de rotulis di</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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