Fabri, Honoré, Tractatus physicus de motu locali, 1646
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              ret tantùm 9. poſito quod non ſit aliud quod reſiſtat; </s>
              <s id="N18448">quanta verò ſit
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              grauitas omnium corporum tùm duriorum, qualia ſunt metalla, tùm li­
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              quidorum, tùm ſpirabilium, dicemus ſuo loco; illorum tabulas habes
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              apud Gethaldum, & Merſennum. </s>
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              Theorema
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              88.
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              Hinc, ſi nihil aliud deſcenſum corporum grauium impediret, cognito pen­
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              dere vtriuſque, medij & corporis grauis, ſpatio, quod in vno illorum conficit,
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              cognoſci poſſet ſpatium, quod in alio conficeret æquali tempore
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              , v. g. ſuppona­
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              mus grauitatem aquæ eſſe ad grauitatem aëris vt 400. ad 1. ſitque corpus,
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              cuius grauitas ſit dupla grauitatis aquæ; </s>
              <s id="N18477">haud dubiè eo tempore, quo
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              conficit in aëre 799. ſpatia, in aqua conf;iciet tantùm 400. quia in vacuo
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              conficeret 800. aër autem detrahit (1/800), & aqua 1/2, vt conſtat ex dictis; </s>
              <s id="N1847F">ſi­
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              militer cognitis ſpatiis in vtroque medio confectis, & grauitate vtriuſque
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              medij cognoſceretur grauitas corporis deſcendentis; quia tamen eſt alia
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              reſiſtentiæ ratio, hîc non hæreo. </s>
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            <p id="N18489" type="main">
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              Scholium.
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              <s id="N18499">Obſeruabis dictum eſſe hactenus; </s>
              <s id="N1849D">ſi nihil aliud deſcenſum corporis
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              grauis impedit; </s>
              <s id="N184A3">nam certè aliud eſt, de quo infrà, ex cuius ignoratione
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              plures haud dubiè in inueſtigandis grauitatum medij rationibus hallu­
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              cinarentur; </s>
              <s id="N184AB">cum enim obſeruatum ſit globum plumbeum, cuius graui­
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              tas eſt ferè dodecupla grauitatis aquæ, conficere in libero aëre 48. pedes
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              ſpatij tempore duorum ſecundorum, in aqua verò 12. pedes eodem tem­
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              pore; </s>
              <s id="N184B5">certè in vacuo ipſo moueretur tardiùs quàm in aëre; </s>
              <s id="N184B9">quia eo tem­
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              pore, quo conficit in aqua 12.pedes in vacuo conficeret (13 1/21), ſi tantùm
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              detrahitur (1/12) grauitationis, & deſcenſus; </s>
              <s id="N184C1">atqui in aëre eodem tempore
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              conficit 48. pedes; </s>
              <s id="N184C7">igitur velociùs moueretur in aëre quàm in vacuo; </s>
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              igitur eſt aliquid aliud quod impedit motum; </s>
              <s id="N184D0">vt enim optimè monet
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              Merſennus, ſi grauitas aquæ ſit ad grauitatem aëris vt 400 ad 1.& graui­
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              tas plumbi ad grauitatem aquæ vt 12. ad 1.eadem grauitas plumbi eſt ad
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              grauitatem aëris vt 4800. igitur ſi ſpatium, quod decurrit plumbum in
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              vacuo diuidatur in 4800. partes, decurret in aëre 4799. partes; </s>
              <s id="N184DC">in aqua
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              verò 4400. quod eſt contra experientiam; </s>
              <s id="N184E2">nam ſpatium, quod decurrit
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              in aëre eſt maius ſpatio, quod decurrit in aqua 3/4; </s>
              <s id="N184E8">quippe conficit 12.
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              pedes in aqua eodem tempore, quo in aëre conficit 48; </s>
              <s id="N184EE">igitur in aqua
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              amittit 3/4 ſuæ grauitationis, & ſui motus; igitur 3600. partes; </s>
              <s id="N184F4">igitur
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              plumbi grauitas eſſet ad grauitatem aquæ vt 4.ad 3.& ad grauitatem aë­
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              ris vt 3600. ad 1. atqui vtrumque falſum eſſe conſtat; </s>
              <s id="N184FC">igitur eſt aliquid
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              aliud, quod etiam impedit motum; nec ex motu diuerſo per diuerſa me­
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              dia cognoſci poteſt eorum grauitas. </s>
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              Theorema
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              89.
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              Hinc potiori iure reiicies illorum ſententiam, qui volunt impediri motum
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              corporis deſcendentis per diuerſa media pro diuerſa ratione grauitatum vtriuſ­
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              que medy
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              ; quod certè falſum eſt; </s>
              <s id="N18521">nam aqua ſit ad grauitatem aëris vt
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              400. ad 1. deberet omne corpus deſcendere velociùs in aëre quadrin-</s>
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