Fabri, Honoré, Tractatus physicus de motu locali, 1646

Table of figures

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              motus propiùs accedit ad lineam brachij extenti: hinc quò plus cotra­
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              hitur brachium ad infligendum ictum eſt validior ictus, quia eſt lon­
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              gior linea & magis directa, quod natura ipſa docuit pueros pugnis con­
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              tendentes. </s>
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              <s id="N27ED2">Septimò, auerſa manu impingitur validior colaphus, quàm aduerſa; </s>
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              quia mouetur manus per arcum paulò maiorem ſemicirculo; </s>
              <s id="N27EDB">in quo
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              motus continuò creſcit; at verò ſi aduerſâ; </s>
              <s id="N27EE1">non validus eſt ictus; </s>
              <s id="N27EE5">pri­
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              mò quia quando auerſa infligitur, & eſt motus circa duplex centrum,
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              vterque circularis in
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              partem tendit; </s>
              <s id="N27EF1">igitur maior eſt; </s>
              <s id="N27EF5">ſecus
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              accidit cum aduerſà: </s>
              <s id="N27EFB">Secundò, non tam extendi poteſt brachium impa­
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              ctum introrſum, quàm in aduerſam partem; igitur minor eſt arcus,
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              vel os humeri ſiſtitur, atque ita ex parte extinguitur ictus. </s>
              <s id="N27F03">Tertiò
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              manus auerſa durior eſt, quàm aduerſa; </s>
              <s id="N27F09">eſt enim vola mollior; </s>
              <s id="N27F0D">hæc
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              verò mollities extinguit vim ictus, vt ſæpè demonſtrauimus: de rota­
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              tione brachij, quæ maximè vim auget, dicemus infrà, cum de Tudicu­
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              la, clauâ, baculo, de lineis verò dicemus lib.12. </s>
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              <s id="N27F19">Octauò, qui longioribus brachijs inſtructi ſunt, maiores ictus
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              infligunt; </s>
              <s id="N27F1F">patet, quia maiorem deſcribunt arcum; </s>
              <s id="N27F23">igitur velociore
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              motu rotatur pugnus; </s>
              <s id="N27F29">cum tamen motu circulari mouetur brachium;
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              certum eſt maiorem ictum minimè infligi ab extremitate, vt conſtat
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              ex dictis de baculo lib.1. Th.73. niſi fortè ratione contracti pugni, quod
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              iam ibidem indicauimus. </s>
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              <s id="N27F35">Nonò, cum deorſum impingitur pugnus, creſcit ictus propter acceſ­
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              ſionem motus naturalis accelerati; </s>
              <s id="N27F3B">eſt enim corpus graue; </s>
              <s id="N27F3F">cum ſurſum,
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              è contrario imminuitur motus: in qua verò proportione, dicemus in­
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              frà cum de malleo. </s>
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              <s id="N27F49">Decimò, aliquando rotatur brachium, antequam infligatur ictus,
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              vel introrſum, vel in partem oppoſitam, præſertim vt longiùs ia­
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              ciatur lapis, vt pila reticulo, vel auerſo, vel aduerſo procul
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              emittatur, &c. </s>
              <s id="N27F52">ratio eſt, quia continuò augetur motus, vt iam di­
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              ctum eſt. </s>
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            <p id="N27F57" type="main">
              <s id="N27F59">Vndecimò, breuiter indico ictum inflictum ab ipſo cubiti capi­
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              te retrò acto, ſatis grauem eſſe; </s>
              <s id="N27F5F">tùm quia durior eſt ille nodus; tùm
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              quia ad eius motum non modò ſuperius brachij ſegmentum, verùm
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              etiam inferius concurrit. </s>
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              <s id="N27F69">Duodecimò, infligitur etiam grauis ictus calce, cuius eſt eadem
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              ratio, quæ ſuprà; eſt enim duplex centrum, duplex motus, &c. </s>
              <s id="N27F6F">Ob­
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              ſeruabis tamen. </s>
              <s id="N27F74">Primò ictum maiorem infligi, ſi crura longiora ſunt. </s>
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              Secundò aduerſo calce quam auerſo; eſt enim oppoſita brachiorum
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              ratio, cùm genu aduerſum ſit, & auersum cubiti caput. </s>
              <s id="N27F7E">Tertiò, equi
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              è contrario calcem fortiùs retroagunt, quia tibiæ poſterioris ge­
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              nu auerſum eſt; </s>
              <s id="N27F86">adde quoque ictum ab ipſo genu inflictum; </s>
              <s id="N27F8A">de
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              quo idem dicendum eſt, quod de ictu à nodo cubiti inflicto iam
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              diximus; quippe in eo tantùm differunt, quòd habeant contrarios
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              ſitus. </s>
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