Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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127
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aeream lanuginem, ſeu cruſtam continguam, & con
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nexam LG, verùm lanci oppoſitæ B, adhæret ſphæ
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ra aerea HK denſior, vt potè non excalefacta à ferro
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feruente; hinc fit vt ſumma lancis B vnà cum adnexa
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cruſta ambientis aeris HK grauior ſit ærea lamina A
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vnà cum rariori lanugine aeris adhærentis LG.
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Mirũ
">Mirum</
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igitur non eſt, quòd a maiori pondere libræ extremi
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tas E deprimatur, & ei oppoſita D eleuetur. </
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<
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ferè modo, vt dicebam priùs, aer cubiculi circą,
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caminum cùm ſit valdè denſus, comparatus cum
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abbr
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flã-ma
">flam
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ma</
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, & aere calefacto intra caminum exiſtente, &
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ideò valdè rarefacto, mirum non eſt ſi proptèr illius
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grauitatem excedentem ſursùm exprimat leuiorem
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flammam, acremque adhærentem paritèr rarum. </
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<
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s.000638
">Eſt
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igitur euidentiſſimum in hiſce experimentis, quòd
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aer
<
expan
abbr
="
flammã
">flammam</
expan
>
ambiens, nedùm eam exprimit, ſed
<
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abbr
="
bonã
">bonam</
expan
>
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partem aeris
<
expan
abbr
="
rarefactã
">rarefactam</
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vnà cum
<
expan
abbr
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flãma
">flamma</
expan
>
impellit quo
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que ſursùm. </
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<
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id
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s.000639
">Sed dicet aliquis, cur circa flammam̨
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lucernæ non obſeruatur prædictus ventus? </
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">reſpon
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detur non eſſe æquè ſenſibilem, quia nimirum lucer
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næ flamma non inſinuatur intra fiſtulam aliquam, vt
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eſt canalis camini, qui exitum habet extra
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cubiculũ
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;
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cùm ergo lucernæ flamma vndique ambiatur ab aere
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aperto abſque euidenti cun motione eam impellere
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ſursùm poteſt exprimendo, nimirùm facto breui cir
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cuitu à vertice flammæ vſque ad eius baſim, & ob
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flammę exiguitatem parua quoque eſt moles aeris ei
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contigua, quę agitatur, & conuoluitur, & hæc eſt
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ratio, quare circa lucernæ flammam ventus non ob-</
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