Fabri, Honoré, Tractatus physicus de motu locali, 1646

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          <chap id="N1EE3A">
            <p id="N1F375" type="main">
              <s id="N1F381">
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              linea; </s>
              <s id="N1F38A">igitur eſt noua, igitur illa determinatur; cur enim potiùs, quàm
                <lb/>
              alia, niſi determinaretur vna. </s>
            </p>
            <p id="N1F390" type="main">
              <s id="N1F392">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
                <emph.end type="italics"/>
              16.
                <emph.end type="center"/>
              </s>
            </p>
            <p id="N1F39E" type="main">
              <s id="N1F3A0">
                <emph type="italics"/>
              Non determinatur à puncto contactus
                <expan abbr="tamũm">tantum</expan>
                <emph.end type="italics"/>
              ; </s>
              <s id="N1F3AC">quia ab eodem puncto
                <lb/>
              plures lineæ reflexionis procedere poſſunt; </s>
              <s id="N1F3B2">non à linea incidentiæ tan­
                <lb/>
              tùm; </s>
              <s id="N1F3B8">quia ſi tantillùm inclinetur planum eadem linea incidentiæ poteſt
                <lb/>
              habere diuerſas lineas reflexionis; </s>
              <s id="N1F3BE">non determinatur
                <expan abbr="deniq;">denique</expan>
              ab ipſo plano
                <lb/>
              inclinato quod diuerſas lineas reflectit; </s>
              <s id="N1F3C8">non determinatur, inquam, ab
                <lb/>
              his omnibus ſeorſim ſumptis, vt patet, ſed ab omnibus coniunctim: </s>
              <s id="N1F3CE">
                <lb/>
              quippe ab his determinatur linea motus, ex quibus poſitis, & applicatis
                <lb/>
              neceſſariò ſequitur; </s>
              <s id="N1F3D5">ſed ex applicatione iſtorum omnium ſeorſim non ſe­
                <lb/>
              quitur talis linea; </s>
              <s id="N1F3DB">quæ tamen ſequitur ex applicatione omnium coniun­
                <lb/>
              ctim, vt patet; igitur ab his coniunctim ſumptis determinatur linea. </s>
            </p>
            <p id="N1F3E1" type="main">
              <s id="N1F3E3">Dices, linea incidentiæ non eſt ampliùs, quando linea reflexionis
                <lb/>
              determinatur; igitur non poteſt illam determinare. </s>
              <s id="N1F3E9">Reſpondeo deter­
                <lb/>
              minationem in eo eſſe poſitam tantùm, quòd impetus poſito tali angulo
                <lb/>
              incidentiæ non poſſit aliam inire lineam, præter illam vnicam; </s>
              <s id="N1F3F1">cùm enim
                <lb/>
              impetus ex ſe ſit indifferens ad omnes lineas, eo ipſo determinatur ad
                <lb/>
              vnam, quo impeditur ne per alias motus propagetur; </s>
              <s id="N1F3F9">atqui angulus inci­
                <lb/>
              dentiæ non modò dicit lineam incidentiæ, ſed lineam plani, atque adeo
                <lb/>
              apicem anguli qui eſt in puncto contactus; igitur poſito illo angulo
                <lb/>
              incidentiæ impetus determinatur ad lineam reflexionis. </s>
            </p>
            <p id="N1F403" type="main">
              <s id="N1F405">Porrò quod impediatur omnis alia linea, patet ex eo, quod primo ipſa
                <lb/>
              linea incidentiæ impeditur ne vlteriùs producatur ab impenetrabilita­
                <lb/>
              te; & duritie plani reflectentis; immò & omnes aliæ impediuntur, quæ
                <lb/>
              per ipſum planum duci poſſunt. </s>
            </p>
            <p id="N1F40F" type="main">
              <s id="N1F411">Secundò, quod ſpectat ad alias, quæ citra planum reflectens à pun­
                <lb/>
              cto contactus duci quoque poſſunt, omnes præter vnam impediuntur,
                <lb/>
              quæ ſcilicet facit angulum cum plano æqualem angulo incidentiæ, vt
                <lb/>
              demonſtrabimus infrà. </s>
            </p>
            <p id="N1F41A" type="main">
              <s id="N1F41C">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
                <emph.end type="italics"/>
              17.
                <emph.end type="center"/>
              </s>
            </p>
            <p id="N1F428" type="main">
              <s id="N1F42A">
                <emph type="italics"/>
              Ideo determinatur impetus ad omnem lineam, quia impeditur prior linea
                <emph.end type="italics"/>
              ;
                <lb/>
              clarum eſt; niſi enim impediretur prior; </s>
              <s id="N1F435">certè non determinaretur ad
                <lb/>
              nouam, quod certum eſt: </s>
              <s id="N1F43B">adde quod planum reflectens perinde ſe habet,
                <lb/>
              que ſi mobile impelleret cum eo impetus gradu, quem ipſum mobile
                <lb/>
              iam habet; </s>
              <s id="N1F443">impelleret autem per lineam perpendicularem in puncto
                <lb/>
              contactus erectam; ſed propter priorem determinationem fit noua linea
                <lb/>
              mixta, de qua infrà. </s>
            </p>
            <p id="N1F44B" type="main">
              <s id="N1F44D">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
                <emph.end type="italics"/>
              18.
                <emph.end type="center"/>
              </s>
            </p>
            <p id="N1F459" type="main">
              <s id="N1F45B">
                <emph type="italics"/>
              Corpus reflectens impedit motum
                <emph.end type="italics"/>
              ; </s>
              <s id="N1F464">quia eſt impenetrabile, durum, den­
                <lb/>
              ſum; ſed de his infrà, quando conſiderabimus impedimenta ratione
                <lb/>
              materiæ. </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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