Fabri, Honoré, Dialogi physici in quibus de motu terrae disputatur, 1665

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            <p type="main">
              <s id="s.000553">
                <pb pagenum="50" xlink:href="025/01/054.jpg"/>
              frà rectam AG deſcendat, nec ab hac poſſit diſcedere; certè non ideò
                <lb/>
              globus volvitur, vt centrum A deſcendat, cùm deſcendere poſſit, etiamſi
                <lb/>
              non volvatur; igitur ideò volvitur, ſeu rotatur, quia cum vtroque modo
                <lb/>
              deſcendere valeat centrum A, per eandem ſcilicet lineam AG, & cùm pri­
                <lb/>
              mo modo difficiliùs deſcendat, propter affrictum partium; ideò ſecundo
                <lb/>
              modo deſcendit, quia ſic faciliùs deſcendit; ſic enim corpus grave non mo­
                <lb/>
              do determinatum eſt ad motum, ſed etiam ad faciliorem, cæteris paribus,
                <lb/>
              motum. </s>
            </p>
            <p type="main">
              <s id="s.000554">
                <emph type="italics"/>
              Auguſtin.
                <emph.end type="italics"/>
              </s>
              <s id="s.000555"> Audivi hactenus, in rotis valere rationem vectis; eſt enim
                <lb/>
              vectis quidam perpetuus; vnde manifeſta petitur ratio, cur majoribus
                <lb/>
              rotis currus inſtruantur; nempe inde creſcit mechanicæ potentiæ mo­
                <lb/>
              mentum. </s>
            </p>
            <p type="main">
              <s id="s.000556">
                <emph type="italics"/>
              Antim.
                <emph.end type="italics"/>
              </s>
              <s id="s.000557"> Quis negat, in rotis haberi rationem vectis in vecte tamen ſup­
                <lb/>
              ponitur aliquod punctum quaſi immobile, quod in ipſo Hypomoclio col­
                <lb/>
              locatur; quod vt meliùs intelligatur. </s>
            </p>
            <figure id="id.025.01.054.1.jpg" xlink:href="025/01/054/1.jpg" number="17"/>
            <p type="main">
              <s id="s.000558">Supponatur planum DH eſſe horizon­
                <lb/>
              tale, in quo ſit rota, eaque trahatur fune
                <lb/>
              AG, inſerto ſcilicet axe per
                <expan abbr="centrũ">centrum</expan>
              illius
                <lb/>
              A, haud dubiè ſi æquè facile
                <expan abbr="vtraq;">vtraque</expan>
              extre­
                <lb/>
              mitas diametri rotæ DC adduci poſſet à
                <lb/>
              potentia trahente per AG vtraque extre­
                <lb/>
              mitas, ac proinde reliquæ omnes partes
                <lb/>
              rotæ per parallelas AG adducerentur, &
                <lb/>
              omnes æquè citò
                <expan abbr="moverẽtur">moverentur</expan>
              , vt reverà fit,
                <lb/>
              ſi rota humido innatet; at
                <expan abbr="cũ">cum</expan>
              propter
                <expan abbr="af-frictũ">af­
                  <lb/>
                frictum</expan>
              planireta; detur D, ac proinde difficiliùs accedat:
                <expan abbr="punctũ">punctum</expan>
              C longè faci­
                <lb/>
              liùs accedit; item A. &c. </s>
              <s id="s.000559">ac proinde citiùs
                <expan abbr="accedũt">accedunt</expan>
              , ex quo inæquali acceſſu,
                <lb/>
              propter partium nexum, motus orbis neceſſariò ſequitur: Iam vero ſuppo­
                <lb/>
              ne planum inclinatum, & nullam potentiam extrinſecam applicatam eſſe
                <lb/>
              centro A, ſed ſolam ineſſe gravitatem rotæ, quæ à centro A exeritur ab
                <lb/>
              intrinſeco, eodem prorſus modo, quo ante à potentia, fune applicata
                <lb/>
              in plano horrizontali, & vt potentia extrinſeca movet rotam eo motu, quo
                <lb/>
              faciliùs moveri poteſt, mixto ſcilicet ex motu centri & orbis, in hoc plano,
                <lb/>
              ita & propria rotæ gravitas in inclinato; quid clarius? </s>
              <s id="s.000560">maneat igitur illud
                <lb/>
              principium, quòd ſcilicet corpora eo motu moveantur, cæteris paribus, quo
                <lb/>
              faciliùs moveri poſſunt. </s>
            </p>
            <p type="main">
              <s id="s.000561">
                <emph type="italics"/>
              Auguſtin.
                <emph.end type="italics"/>
              </s>
              <s id="s.000562"> Do manus, & rem optimè capio, ſed antequam vlteriùs per­
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              gas, vnum ex te, Antime; reſcire velim, circa ca, quæ in heſterno con­
                <lb/>
              greſſu à te accepi. </s>
              <s id="s.000563">Illico probavi, vbi diſceſſiſti, pulcherrimum illud expe­
                <lb/>
              rimentum tubi vitrei, in quo aqua per ſpiras deſcendit, dum ſurſum extru­
                <lb/>
              dit, eo, quo dixiſti, modo incluſam illam aëris portionem; obſervavi
                <lb/>
              enim. illam aëris portionem in cylindrum priore contractiorem, vt labenti
                <lb/>
              aquæ ſecus cavam tubi ſuperficiem locus detur, conformari, ita vt tamen
                <lb/>
              ſupicma pars ſit convexa ſphærica infima verò baſis, omnino plana, ſaltem
                <lb/>
              provt oculo ſubjicitur. </s>
            </p>
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