Casati, Paolo, Terra machinis mota : dissertationes geometricae, mechanicae physicae hydrostaticae

Table of figures

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                <pb xlink:href="018/01/203.jpg" pagenum="189"/>
              dio habet certam differentiam, vt in ignę
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              dixi exceſſum grauitatis aquæ ſupra grauita­
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              tem globi terreni ex igne & argillâ conflati
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              eſſe 89; in quocunque medio conſtituantur,
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              eundem habebit exceſſum. </s>
              <s>Sic in aëre gra­
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              uitas 3/4 argillæ & 1/4 ignis eſſet defectiua, vt re­
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              ctè Galilæus ratiocinabatur, videlicet——
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              67 2/3, & grauitas æqualis molis aquæ in aëre
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              eſſet poſitiua, nimirùm 21 1/3 (ducto 4 per
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              5 1/3) differentia autem, qua maior numerus
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              21 1/3 excedit minorem —— 67 2/3, eſt 89 planè
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              eadem ac prius. </s>
              <s>Satis igitur fuit in vno ali­
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              quo medio differentiam reperire, cùm illa
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              ſemper eadem maneat. </s>
              <s>Opportunius verò
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              accidit in medio omnium leuiſsimo, in quo
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              ignis ipſe globi molem componens nihil
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              grauitat, examen illud inſtituere, quia om­
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              nes partium grauitates poſitiuæ ſunt, nulla
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              defectiua. </s>
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              XC
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              Ratio
                <expan abbr="gra-uitatũ">gra­
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                uitatum</expan>
              duo­
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              rum corpo­
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              rum in vno
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              medio, est
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              eadem iņ
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              omni medio.
                <emph.end type="italics"/>
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              <s>Cæterùm non timui, ne terrenus globus
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              auolaret, quemadmodum ouorum putami­
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              na, vt aiunt, matutino rore impleta & meri­
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              diano Soli expoſita. </s>
              <s>Qui enim tres orbis qua­
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              drantes intrà aquam exiſtimat grauiores non
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              eſſe, quàm ſi ex merâ argilla conſtarent,
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              quia aqua illis permiſta nihil grauitat, & aër
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              valde leuitat, fortaſsè non item aſſerat tres </s>
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