Heron <Alexandrinus>, Heronis Alexandrini spiritalium liber

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        <div xml:id="echoid-div131" type="section" level="1" n="83">
          <p>
            <s xml:id="echoid-s1919" xml:space="preserve">
              <pb o="97" file="0103" n="103" rhead="SPIRITAL. LIBER."/>
            detentaque à quibuſdam clavis capita habentibus, ne excedat, quam
              <lb/>
            vocant platyſmation, præterea ab hemiſphærio E F G H alter produ-
              <lb/>
            catur tubus F V ſimul perforatus cum alio tubo tranſverſo V Z, in quod
              <lb/>
            imponantur tibiæ cum ipſo perforatæ α, habentesque ex partibus in-
              <lb/>
            ferio ribus tamquam gloſſocoma ſimul perſorata cum ipſis, quorum ora
              <lb/>
            β apertæ ſint. </s>
            <s xml:id="echoid-s1920" xml:space="preserve">Et per ora impellantur opercula, quæ foramina habeant,
              <lb/>
            ita ut operculis inductis eorum foramina reſpondeant foraminibus tibia-
              <lb/>
            rum; </s>
            <s xml:id="echoid-s1921" xml:space="preserve">eductis autem iiſdem foramina permutentur, & </s>
            <s xml:id="echoid-s1922" xml:space="preserve">tibias obturent.
              <lb/>
            </s>
            <s xml:id="echoid-s1923" xml:space="preserve">Siigitur regula tranſverſa ex parte Φ impellatur in partem inferiorem, em-
              <lb/>
            bolus RS aſcendens expellet aërem in modiolo NXOP contentum, qui
              <lb/>
            quidem aër claudet foramen, quod eſt in parvo modiolo per jam dictum
              <lb/>
            platyſmation. </s>
            <s xml:id="echoid-s1924" xml:space="preserve">Procedet autem per tubum MLKG in furnum, & </s>
            <s xml:id="echoid-s1925" xml:space="preserve">ex furno
              <lb/>
            in tranſverſum tubum V Z per tubum FV, deinde ex tranſverſo tubo in ti-
              <lb/>
            bias, quando earum ſoramina ſoraminibus operculorum reſpondeant: </s>
            <s xml:id="echoid-s1926" xml:space="preserve">
              <lb/>
            hoc eſt quando opercula inducta ſint, vel omnia, vel aliqua eorum. </s>
            <s xml:id="echoid-s1927" xml:space="preserve">Ut
              <lb/>
            igitur quando volumus tibias aliquas ſonare, earum foramina aperiantur,
              <lb/>
            & </s>
            <s xml:id="echoid-s1928" xml:space="preserve">quando volumus ceſſare, claudantur, ita faciemus. </s>
            <s xml:id="echoid-s1929" xml:space="preserve">Intelligatur unum
              <lb/>
            aliquod ex gloſſocomis ſeorſum poſitum γ {δι}
              <unsure/>
            , cujus os ſit {δι}
              <unsure/>
            , tibia vero ſi-
              <lb/>
            mul cum eo perſorata ε, & </s>
            <s xml:id="echoid-s1930" xml:space="preserve">operculumipſi congruens ζ ς, quod foramen
              <lb/>
            habet η, à tibia ε permutatum. </s>
            <s xml:id="echoid-s1931" xml:space="preserve">Sit præterea cubitulus trimembris ς θ χ λ,
              <lb/>
            cujus membrum σ τ θ conjunctum ſit operculo ζ σ τ, & </s>
            <s xml:id="echoid-s1932" xml:space="preserve">ad θ χ circa cla-
              <lb/>
            vum moveatur. </s>
            <s xml:id="echoid-s1933" xml:space="preserve">Si igitur manu deducemus extremum cubituli λ, ad
              <lb/>
            {δι}
              <unsure/>
            oſculum gloſſocomi transferemus operculum in partem interiorem,
              <lb/>
            & </s>
            <s xml:id="echoid-s1934" xml:space="preserve">cum in partem interiorem inciderit, tunc foramen, quod eſt in ipſo
              <lb/>
            tibiis reſpondens efficitur. </s>
            <s xml:id="echoid-s1935" xml:space="preserve">Ut autem quando manum auferamus opercu-
              <lb/>
            lum ſua ſponte extrahatur, & </s>
            <s xml:id="echoid-s1936" xml:space="preserve">tibiam permutet, hæc ſient. </s>
            <s xml:id="echoid-s1937" xml:space="preserve">Subjiciatur ſub
              <lb/>
            gloſſocomis regula æqualis tubo V Z & </s>
            <s xml:id="echoid-s1938" xml:space="preserve">ipſi parallela μ ν, in qua infigan-
              <lb/>
            tur ſpatulæ corneæ robuſtæ, & </s>
            <s xml:id="echoid-s1939" xml:space="preserve">inflexæ, quarum una eſt O, poſita ad
              <lb/>
            gloſſocomum γ {δι}
              <unsure/>
            : </s>
            <s xml:id="echoid-s1940" xml:space="preserve">ab extremo autem ipſius nervus alligatus referatur cir-
              <lb/>
            ca extremum θ, ita ut operculo intus impulſo nervus extendatur. </s>
            <s xml:id="echoid-s1941" xml:space="preserve">Ita-
              <lb/>
            que ſi deducentes extremum cubituli λ operculum in partem interiorem
              <lb/>
            impellamus, nervus attrahet ſpatulam, ut inflexionem ipſius vi erigat. </s>
            <s xml:id="echoid-s1942" xml:space="preserve">
              <lb/>
            Quando autem dimittamus, rurſus ſpatula in priſtinum locum reſtituta,
              <lb/>
            inflexaque oris operculum extrahet, adeo ut foramen permutetur. </s>
            <s xml:id="echoid-s1943" xml:space="preserve">His
              <lb/>
            igitur in unoquoque gloſſocomo conſtitutis, quando volumus aliquas
              <lb/>
            tibiarum ſonare, digitis deducemus cubitulos, qui ſunt circa ipſas: </s>
            <s xml:id="echoid-s1944" xml:space="preserve">& </s>
            <s xml:id="echoid-s1945" xml:space="preserve">
              <lb/>
            quando volumus non amplius ſonare digitos elevabimus, & </s>
            <s xml:id="echoid-s1946" xml:space="preserve">tunc ceſſa-
              <lb/>
            bunt attractis operculis. </s>
            <s xml:id="echoid-s1947" xml:space="preserve">Aqua vero quæ eſt in arula ideo injicitur, ut
              <lb/>
            aër ſuperabundans in furno, qui ſcilicet ex modiolo impulſus aquam </s>
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