Fabri, Honoré, Tractatus physicus de motu locali, 1646

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              ſumatur AF æqualis AH, addaturque impetus, qui ſit ad acquiſitum in
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              H, vt GF ad FA, vel AH, & habebitur intentum: </s>
              <s id="N1DEF7">dixi totum ſpatium re­
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              ſpondens ſcilicet toti motui; </s>
              <s id="N1DEFD">alioqui ſi pars tantùm accipiatur tùm ſpa­
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              tij, tùm motus, res procul dubio ſecus accidet; ſit enim impetus impreſ­
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              ſus vt BC ad AB. </s>
              <s id="N1DF06">Equidem primò tempore, quo in perpendiculari con­
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              citur AE, conficitur AC æqualis; </s>
              <s id="N1DF0C">at verò ſecundo, quo conficitur EG
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              triplum AE in perpendiculari, conficitur CI quadruplum AC, vel
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              AE; </s>
              <s id="N1DF14">igitur non ſunt æqualia ſpatia; ſed hæc ſunt ſatis facilia. </s>
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              Theorema
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              50.
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              Si planum horizontale ſit perfectè læuigatum in vne tantùm illius puncto ſi­
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              ſtere poteſt mobile graue
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              ; </s>
              <s id="N1DF33">ſit enim globus terræ centro A ſemidiametro
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              AE; </s>
              <s id="N1DF39">ſitque planum horizontale FEGN læuigatiſſimum: dico quòd in
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              puncto contactus E quieſcet mobile. </s>
              <s id="N1DF3F">Probatur, quia ex omni alio puncto
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              mobile poteſt deſcendere; </s>
              <s id="N1DF45">ſit enim in G. v.g. haud dubiè GA maior eſt
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              AE; </s>
              <s id="N1DF4D">igitur GE planum eſt inclinatum, id eſt, E propiùs accedet ad cen­
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              trum terræ A; ſed per planum inclinatum mobile deſcendit per hyp. </s>
              <s id="N1DF53">1.
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              idem dico de omni alio plani puncto, excepto puncto E, ex quo non
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              poteſt moueri, niſi aſcendat, id eſt à centro A recedat; igitur in eo
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              quieſcet. </s>
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              Theorema
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              51.
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              Hinc in menſa lauigatiſſima globus vel eburneus, vel cryſtallinus vix vn­
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              quam ſistit, niſi in eius centro,
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              quod multis experimentis comprobatum
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              eſt, & ratio luce meridianâ clarior à rudioribus etiam primo ſtatim ob­
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              tutu cernitur. </s>
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              Theorema
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              52.
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              Hinc ridiculum ſeu joculare paradoxon, quo ſcilicet dici poteſt duorum alter
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              in eodem plano aſcendere, alter deſcendere, licèt in
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              cœli plagam con­
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              uerſi ambulent
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              ; </s>
              <s id="N1DF9C">ſi enim alter ex G in E; </s>
              <s id="N1DFA0">alter verò ex E in F tenderet; </s>
              <s id="N1DFA4">hic
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              certè aſcenderet, quia recederet à terræ centro A; </s>
              <s id="N1DFAA">ille verò deſcende­
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              ret, quia ad centrum accederet; & ſi in partes oppoſitas ambulent, in
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              hoc eodem plano vterque ſimul aſcendere, vel ſimul deſcendere poteſt. </s>
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              Theorema
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              53.
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              Eſt etiam aliud paradoxon, ſcilicet in eodem puncto E duo plana eadem li­
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              neâ contenta hinc inde aſcendere; </s>
              <s id="N1DFCA">vel duos montes altiſſimos in eadem recta
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              linea contineri; </s>
              <s id="N1DFD0">vel mediam vallem, & gemines montes linea rectiſſima ſimul
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              connecti
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              ; hæc porrò ſunt ſatis facilia, & vix ſupra vulgi captum. </s>
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              Theorema
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              54.
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              Adde aliud paradoxon ſcilicet idem mobile per duo plana parallela inæ­
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              quali motu deſcendere.
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              v.g. per plana XFB, VEA, nam VEA eſt per­
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              pendiculum; at verò XFB eſt horizontale, vt clarum eſt. </s>
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              Theorema
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              55.
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              Poteſt determinari motus proportio cuiuſlibet puncti aſſignati in plano EN
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              ; </s>
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