Huygens, Christiaan, Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica

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            <s xml:id="echoid-s9245" xml:space="preserve">
              <pb o="685" file="0425" n="444" rhead="COSMOTHEOROS, LIB. I."/>
            cta ſunt. </s>
            <s xml:id="echoid-s9246" xml:space="preserve">Si enim ex noſtris Muſicis quæras, cur conſo-
              <lb/>
            nantia diapente poſt aliam ſimilem vitioſe ponatur, dicent
              <lb/>
            alii nimiam dulcedinem devitari, quæ ex gratiſſimæ con-
              <lb/>
            ſonantiæ iteratione naſcatur: </s>
            <s xml:id="echoid-s9247" xml:space="preserve">alii varietatem in harmonicis
              <lb/>
            ſequendam eſſe. </s>
            <s xml:id="echoid-s9248" xml:space="preserve">Hæc enim præcipui artis auctores, cum-
              <lb/>
            que iis Carteſius, adferunt. </s>
            <s xml:id="echoid-s9249" xml:space="preserve">At Jovis aut Veneris incola
              <lb/>
              <note position="right" xlink:label="note-0425-01" xlink:href="note-0425-01a" xml:space="preserve">Cur conſo-
                <lb/>
              nantia dia-
                <lb/>
              pente poſt
                <lb/>
              aliam ſimi-
                <lb/>
              lem vitioſe
                <lb/>
              ponatur.</note>
            forſan veriorem hanc cauſam demonſtrabit, quod à Dia-
              <lb/>
            pentè ad aliam deinceps pergendo, tale quid fiat, ac ſi re-
              <lb/>
            pente toni ſtatum immutemus; </s>
            <s xml:id="echoid-s9250" xml:space="preserve">cum Diapente, unà cum
              <lb/>
            interjecto ditoni ſono, (qui ſi deſit, mente ſuppletur)
              <lb/>
            toni ſpeciem certo conſtituat: </s>
            <s xml:id="echoid-s9251" xml:space="preserve">hujuſmodi vero ſubita com-
              <lb/>
            mutatio auribus merito injucunda inconditaque judicetur;
              <lb/>
            </s>
            <s xml:id="echoid-s9252" xml:space="preserve">cum etiam in univerſum ea plerumque durior accidat,
              <lb/>
            (præterquam in tranſitu) quæ fit à tribus ſonis conſonis,
              <lb/>
            ad trium aliorum harmoniam, nullo priorum manente. </s>
            <s xml:id="echoid-s9253" xml:space="preserve">
              <lb/>
            Sciet etiam ille idem fortaſſe, quod nemo adhuc animad-
              <lb/>
            vertit noſtrorum hominum, cur in nullo vocis unius, plu-
              <lb/>
            riumve cantu, tonus ſervari poſſit in eadem altitudine ac
              <lb/>
            tenore, niſi conſonantia intervalla pleraque ultro, ac ne-
              <lb/>
            mine advertente, ita temperentur, ut à perfectione ſumma
              <lb/>
            nonnihil deſciſcant. </s>
            <s xml:id="echoid-s9254" xml:space="preserve">Et cur optimum ſit hoc tempera-
              <lb/>
            mentum in chordarum ſyſtemate, cum ex Diapente quarta
              <lb/>
            pars commatis ubique deciditur. </s>
            <s xml:id="echoid-s9255" xml:space="preserve">Quod idem abſque ſen-
              <lb/>
            ſibili diſcrimine effici ex diviſione Diapaſon in partes æqua-
              <lb/>
            les 31, indeque Cyclum quendam Harmonicum in ſe re-
              <lb/>
            deuntem exiſtere, non ita pridem oſtendimus. </s>
            <s xml:id="echoid-s9256" xml:space="preserve">Quod ta-
              <lb/>
            men Planetarum incolæ ſi perſpexerunt, etiam Logari-
              <lb/>
            thmorum numeri iis noti eſſe debebunt.</s>
            <s xml:id="echoid-s9257" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s9258" xml:space="preserve">At de Tono vocis temperando quod dixi, probatio-
              <lb/>
              <note position="right" xlink:label="note-0425-02" xlink:href="note-0425-02a" xml:space="preserve">Demon@tra-
                <lb/>
              tio tempera-
                <lb/>
              menti in to-
                <lb/>
              no vocis ad-
                <lb/>
              hibendi.</note>
            nem habet non difficilem; </s>
            <s xml:id="echoid-s9259" xml:space="preserve">quam hic adjungimus, quan-
              <lb/>
            doquidem jam aliquid præter ſomnia noſtra venditare cœ-
              <lb/>
            pimus. </s>
            <s xml:id="echoid-s9260" xml:space="preserve">Ajo itaque, ſi quis canat deinceps ſonos, quos
              <lb/>
            Muſici notant Literis C, F, D, G, C, per intervalla con-
              <lb/>
            ſona, omnino perfecta, alternis voce aſcendens deſcen-
              <lb/>
            denſque; </s>
            <s xml:id="echoid-s9261" xml:space="preserve">jam poſteriorem hunc ſonum C, toto Comma-
              <lb/>
            te, quod vocant, inferiorem fore C priore, unde cani </s>
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