Ceva, Giovanni, Geometria motus, 1692

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            <pb pagenum="92" xlink:href="022/01/098.jpg"/>
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              <s id="s.000888">
                <emph type="center"/>
              Nouum genus Baliſtæ
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              Explicatio.
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              </s>
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            <p type="main">
              <s id="s.000889">
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            <p type="margin">
              <s id="s.000890">
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                <emph type="italics"/>
              Tab.
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              9.</s>
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            <p type="main">
              <s id="s.000891">IN hac figura exprimitur nouum genus Bali­
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              ſtæ, quæ machina præſertim in mole maio­
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              ri, non parum vtilitatis afferre poteſt rei mi­
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              litari ad eiaculanda miſſilia, vt demonſtra­
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              bitur. </s>
              <s id="s.000892">Ex eius verò partibus, quas ſubinde
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              recenſeo, etiam modus ſtructuræ apparebit. </s>
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            <p type="main">
              <s id="s.000893">AM, MX ſunt brachia. </s>
              <s id="s.000894">Punctum M centrum machi­
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              næ. </s>
              <s id="s.000895">Per cauitatem M tranſit telum emiſſum. </s>
              <s id="s.000896">Infra M in­
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              ſeritur manubrium, vt in baliſtis vulgaribus. </s>
              <s id="s.000897">Extremis
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              capitibus A, N adnectitur funis. </s>
              <s id="s.000898">Puncta A, E, F, G, I, K
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              ſunt in linea recta. </s>
              <s id="s.000899">Interualla AE, EF, FG, GI, IK ſunt (li­
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              cèt non neceſſariò) æqualia. </s>
              <s id="s.000900">Altitudinis, ſeu commiſſuræ
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              KL, IH, GD, FC, EB ſunt perpendiculares rectæ occultæ
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              KA. </s>
              <s id="s.000901">Singulæ autem, dum curuatur arcus, aperiuntur cer­
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              ca centra K, I, G, F, E. </s>
              <s id="s.000902">Hinc ſequitur vt funis ex medio
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              dum attrahitur in O, aperiantur prædictæ commiſſuræ, ſeu
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              nodi, & curuentur vtraque brachia, vt in eorum altero ap­
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              paret punctis notato. </s>
              <s id="s.000903">Quilibet ex his nodis arctiſſimè ſtrin­
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              gitur ſupernè, a ſuo elaterio, vt videre eſt in L, H, D, C, B.
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              </s>
              <s id="s.000904">Elateria autem quò propinquiora centro M tanto maiora,
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              & craſſiora debent eſſe remotioribus: Hinc fit vt, propter
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              molem opportunè auctam, æquè facilè aperiantur, ac cæ­
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              tera; & vice verſa, propter craſſitiem maiorem, ſibi relicta
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              validiùs reſtringantur. </s>
              <s id="s.000905">Cuius rei paulo infra rationem
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              dabimus. </s>
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            <p type="main">
              <s id="s.000906">His poſitis facile eſt oſtendere, quantum præſtet hu­
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              iuſcemodi machina vulgaribus & communibus baliſtis. </s>
            </p>
            <p type="main">
              <s id="s.000907">Primùm, in Triangulo ALK cùm altitudines EB, FC,
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              GD, IH, KL ſint perpendiculares, ideoque parallelæ, hinc </s>
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          </chap>
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