Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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cedit, quòd parietes porulorum pumicis duri
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cõ-ſiſtentes
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ſiſtentes</
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, & inter ſe connexi, & vniti, è contrà in gle
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ba parietes pororum ſunt valdè fragiles, & diſſolubi
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les; vnde ſequitur, quòd aquæ particulæ vi grauitatis
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intra poros glebæ inſinuatæ nedùm expellant aerem
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ibi contentum, ſed etiam arenulas glebam conſtitu
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entes, quæ tantummodò ſe tangunt, & nullo alio vin
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culo, nec glutine nectuntur, facilè ab inuicem diſſo
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cient diſpergantque. </
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<
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">porrò cùm ad aquæ
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immiſſionẽ
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,
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& aeris expreſſionem, atque aſcenſum neceſſariò mo
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tus, & agitatio ipſius aquæ
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abbr
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cõſequatur
">conſequatur</
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, hic verò mo
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tus abſque impetu eſſe non poſſit, qui cùm vim cuiuſ
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cumque ponderis finiti ſuperet, vt demonſtrauimus,
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facilè poterit exiguas illas arenulas diſſolutas nedum
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lateraliter, ſed etiam ſursùm aliquantiſper impelle
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re, & hinc oritur turbida quædam nebula, quæ pro
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pè glebam demerſam conſpicitur diù
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. </
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<
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vniuerſa hac naturali operatione nemo ſanæ mentis
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eliciet aquæ particulas continuo, & vago motu agi
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tari naturali inſtinctu, & ab hoc principio produci
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glebæ diſſolutionem, diſperſionemque arenularum
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eius, & feruoris, qui in aqua tunc temporis conſpici
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tur, nam hæc omnia habent ſuam cauſam
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neceſſariã
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,
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nempè aquæ grauitatem, quæ poteſt, & debet
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nedũ
">nedum</
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expellere ſursùm leues aeris particulas intra glebæ
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poroſitates contentas, ſed etiam diſſoluere, & diſper
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gere ſuo impetu puluerulentas glebæ particulas per
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ipſammet aquam. </
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