Benedetti, Giovanni Battista de, Io. Baptistae Benedicti ... Diversarvm specvlationvm mathematicarum, et physicarum liber : quarum seriem sequens pagina indicabit ; [annotated and critiqued by Guidobaldo Del Monte]

Table of contents

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[3.13.] Quòd Ariſtotelisratio in 6. quæſtione poſit a non ſit admittenda. CAP. XIII.
[3.14.] Quòdrationes ab Ariſtotele de octaua quæstione confictæ ſufficient es non ſint. CAP. XIIII.
[3.15.] Quod Aristotelis ratio none queſtionis admittendanon ſit. CAP. XV.
[3.16.] Quod Aristotelis rationes de decima queſtione ſint reijciende. CAP. XVI.
[3.17.] De uer a cauſa .12. questionis mechanice. CAP. XVII.
[3.18.] De decimatertia questione. CAP. XVIII.
[3.19.] De decimaquart a queſtione. CAP. XIX.
[3.20.] De uer a r atione .17. queſtionis. CAP. XX.
[3.21.] De uera & intrinſeca cauſa trocble arum. CAP. XXI.
[3.22.] Depropria cauſa .24. quæſtionis. CAP. XXII.
[3.23.] De uer a cauſa .30. quæstionis. CAP. XXIIII.
[3.24.] Deratione .35. & ultimæ quæstionis. CAP. XXV.
[4.] DISPVTATIONES DE QVIBVSDAM PLACITIS ARISTOTELIS.
[4.1.] Qualiter & ubi Ariſtoteles de uelocitate motuum natura-lium localium aliter tractauerit quam nos ſentiamus. CAP.I.
[4.2.] Quædam ſupponenda ut conſtet cur circa uelocit atem motuum natur alium localium ab Ariſtotelis placitis recedamus. CAP. II.
[4.3.] Poſſe uelocitatem alicuius corporis proportionem contrariam in diuerſis medijs habere cum denſitate eorum. CAP. III.
[4.4.] Oſcitanter ab Ariſtotele nonnibil prolatum cap 8. lib. 4 Phyſicorum. CAP. IIII.
[4.5.] Exempla dictorum. CAP.V.
[4.6.] Quod proportiones ponderum eiuſdem corporis in diuerſis medijs pro portiones eorum mediorum denſit atum non ſeruant. Unde ne-ceßariò inæquales proportiones uelocitatum producuntur. CAP. VI.
[4.7.] Corpora grauia aut leuia eiuſdem figur æ et materiæ ſed inæqualis magnitudinis, in ſuis motibus natur alibus uelocit atis, in eo dem medio, proportionem longè diuerſam ſeruatura eße quam Aristoteliuiſum fuerit. CAP. VII.
[4.8.] Quod duo corpor a in æqualia eiuſdem materia in diuerſis medijs eandem uelocitatis proportionem retinebunt. CAP. VIII.
[4.9.] Anrectè Aristoteles diſeruerit de proportionibus mo-tuum in uacuo. CAP. IX.
[4.10.] Quòd in uacuo corpor a eiuſdem materiæ æquali uelocita-te mouerentur. CAP.X.
[4.11.] Corpora licet inæqualia eiuſdem materiæ & figuræ, ſireſiſten-tias habuerint ponderibus proportionales æqualiter mouebuntur. CAP. XI.
[4.12.] Maior hic demonſir atur eſſe proportio ponder is corpor is den ſioris ad pondus minus denſi in medijs dẽſioribus, quam ſit eorundem corporum in medio minus denſo, nec corporum ponder a ſeruare proportionem denſitatis mediorum. CAP. XII.
[4.13.] Longe aliter ueritatem ſe habere quam Aristoteles doceat in fine libri ſeptimi phyſicorum. CAP. XIII.
[4.14.] Quid ſequatur ex ſupradistis. CAP. XIIII.
[4.15.] Numrestè ſenſerit Philoſophus reſistentias proportionales eße cum corporibus mobilibus. CAP. XV.
[4.16.] Fdipſum aliter demonſtr atur. CAP. XVI.
[4.17.] De alio Aristo. lapſu. CAP. XVII.
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              <pb o="47" rhead="THEOR. ARITH." n="59" file="0059" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/163127KK/pageimg/0059"/>
              <p>
                <s xml:id="echoid-s618" xml:space="preserve">Cuius rationem ſi quæris, ſignificentur .4. numeri lineis,
                  <var>a.e.o.u.</var>
                  <reg norm="diuidaturque" type="simple">diuidaturq́;</reg>
                .2.
                  <lb/>
                per
                  <var>.o.</var>
                &
                  <reg norm="oriatur" type="simple">oriat̃</reg>
                . s. & per
                  <var>.u.</var>
                  <reg norm="oriatur" type="simple">oriat̃</reg>
                  <var>.y.</var>
                et
                  <var>.
                    <lb/>
                    <figure xlink:label="fig-0059-01" xlink:href="fig-0059-01a" number="80">
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                  e.</var>
                diuiſo per
                  <var>.o.</var>
                oriatur
                  <var>.z.</var>
                & per
                  <var>.u.</var>
                  <lb/>
                proueniat
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                tum
                  <var>.n.</var>
                ſit productum
                  <var>.z.</var>
                  <lb/>
                in
                  <var>.y.</var>
                et
                  <var>.m.</var>
                productum
                  <var>.s.</var>
                in
                  <var>.f</var>
                . </s>
                <s xml:id="echoid-s619" xml:space="preserve">Dico
                  <lb/>
                n. futurum æquale
                  <var>.m</var>
                . </s>
                <s xml:id="echoid-s620" xml:space="preserve">Sit deinde
                  <var>.
                    <lb/>
                  x.</var>
                vnitas, quare ex definitione diui-
                  <lb/>
                ſionis eadem erit proportio
                  <var>.s.</var>
                ad
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                  <lb/>
                et
                  <var>.z.</var>
                ad
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                quæ
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                ad
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                . </s>
                <s xml:id="echoid-s621" xml:space="preserve">Sed ita ſe ha-
                  <lb/>
                bet
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                ad
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                et
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                ad
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                ſicut
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                ad
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                ex
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                quo ſic ſe habebit
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                ad
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                ſicut
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                e. et
                  <var>.a.</var>
                ad. y, ſicut
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                ad
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                . </s>
                <s xml:id="echoid-s622" xml:space="preserve">Itaque ex
                  <lb/>
                æqualitate proportionum ſic ſe ha-
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                bebit s. ad
                  <var>.y.</var>
                ſicut
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                ad
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                . </s>
                <s xml:id="echoid-s623" xml:space="preserve">Igitur ex
                  <lb/>
                15. ſexti aut .20. ſeptimi productum
                  <var>.
                    <lb/>
                  n.</var>
                producto
                  <var>.m.</var>
                æquale erit.</s>
              </p>
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            <div xml:id="echoid-div142" type="math:theorem" level="3" n="72">
              <head xml:id="echoid-head88" xml:space="preserve">THEOREMA
                <num value="72">LXXII</num>
              .</head>
              <p>
                <s xml:id="echoid-s624" xml:space="preserve">ALIVD quoque problema à me inuentum eſt, nempe vt proponantur .4.
                  <lb/>
                numeri qualeſcunque tandem, quorum duo diuiſibiles ſint, tertius diuiſor
                  <lb/>
                vnius è duobus pro libito,
                  <reg norm="quæramusque" type="simple">quæramusq́;</reg>
                alterius diuidentem, qui ſic ſe habeat vt pro
                  <lb/>
                ductum duorum prouenientium quarto numero propoſito ſit æquale.</s>
              </p>
              <p>
                <s xml:id="echoid-s625" xml:space="preserve">Exempli gratia, proponuntur .4. numeri .20. 48. 5. 12. porrò .20. et .48. numeri
                  <lb/>
                ſint diuiſibiles et .5.
                  <reg norm="diuidens" type="context">diuidẽs</reg>
                vnius, ut potè .20. </s>
                <s xml:id="echoid-s626" xml:space="preserve">
                  <reg norm="Quærendus" type="context">Quærẽdus</reg>
                nunc erit diuidens alterius
                  <lb/>
                nempe .48. eiuſmodi vt productum prouenientium æquale ſit .12. </s>
                <s xml:id="echoid-s627" xml:space="preserve">Diuidam itaque
                  <num value="20">.
                    <lb/>
                  20.</num>
                per .5.
                  <reg norm="prouenietque" type="simple">prouenietq́;</reg>
                4. quem per .48. multiplicabo, nempe per alterum diuiſibi-
                  <lb/>
                lem,
                  <reg norm="ſicque" type="simple">ſicq́;</reg>
                proueniet .192. quod productum per quartum numerum nempe .12. diui-
                  <lb/>
                fum dabit .16. qui erit diuidens quæſitus, quo diuiſo .48. proueniet .3. ſecundum ſci
                  <lb/>
                licet proueniens, quo per alterum hoc eſt .4. multiplicato producetur quartus nu-
                  <lb/>
                merus .12.</s>
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              <p>
                <s xml:id="echoid-s628" xml:space="preserve">Quod vt ſciamus, primus nume-
                  <lb/>
                rus diuiſibilis ſignificetur
                  <reg norm="rectangulo" type="context">rectãgulo</reg>
                  <var>.
                    <lb/>
                    <figure xlink:label="fig-0059-02" xlink:href="fig-0059-02a" number="81">
                      <image file="0059-02" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/163127KK/figures/0059-02"/>
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                  a.i.</var>
                ſecundus rectangulo
                  <var>.o.u.</var>
                primus
                  <lb/>
                diuidens latere
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                quartum nume-
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                rum rectangulo
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                primum proue-
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                niens latere
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                ſecundus diuidens la
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                tere
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                (hic autem eſt quem quæri-
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                mus) tum alterum proueniens ſigni
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                ficetur latere
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                . </s>
                <s xml:id="echoid-s629" xml:space="preserve">Iam
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                erit pro-
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                portio
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                ad
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                quæ
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                ad
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                Sed cum cognitæ ſint tres quantita-
                  <lb/>
                tes
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                :
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                : et
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                quarta quoque. e
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                  <var>.u.</var>
                exregula de tribus immediatè cognoſcetur,
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                cætera in ſubſcripta figura facillimè patebunt.</s>
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