Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

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1
alia ſimili vnctuoſa materia, huius verò corporis re­
maneat vna pars FK eminens ſupra aquæ libellam̨,
vel emineat paries eiuſdem̨
130[Figure 130]
vaſis, tunc conſtat experientia,
quòd aqua non perſiſtit in in­
fima eius libella horizontali
AK, ſed repit, aſcenditque per ſuperficiem eleuatam
KG efformando priſma aqueum triangulare, cuius
ſectio eſt BGK, ibidemque retinetur ſuſpenditurque
mons prædictus aqucus, non ſecus ac ſi à pariete cur­
uo BG impediretur eius fluxus deorſum verſus aquam
ſubiectam AB.
Quia verò aqua non amittit naturalem
eius grauitatem, aſſignari debet cauſa à qua ſuſpenſa
retinetur, & quæ vis ipſam ſursùm prius impulit.
Hæc profectò aut propria, & naturalis eſt ipſius aquę,
vt nimirùm ſponte ſua ſursùm aſcendat, ibidemquę
retineatur, aut hoc ſit ab aliqua cauſa violenta ex­
terna.
Quòd verò non ſit vis propria, & natiua ipſius
aquæ, patet ex ſuperiùs dictis, quia nimirùm ſemper
aqua grauis eſt, exercetque ſuam vim compreſſiuam
versùs centrum telluris, vt ſenſus euidentia conſtat.
Cap. 8. cur
exiguæ aquæ
guttæ ſupra
libellam aquæ
aſcendunt.
Alij poſtea recurrunt ad aeris vim compreſſiuam,
aiunt enim aerem contiguum interno vaſis parieti GK
minori energia ſubiectam aquam K comprimere, quam
aer HB à pariete remotus premat ſubiectam aquam
B, propterea quòd illa quodammodo ab aſperita­
tibus parietis retinetur, ac impeditur ne libero co­
natu, & fluxu premere queat aquam ſubiectam K cum
hæc vniuerſam ſuam grauitatis, & virtutis elaſticæ

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