Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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dinum earumdem, numquam tamen cuitari poteſt
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cylindrorum agitatio, & oſcillatio lateralis dum a
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ſcendunt, vel deſcendunt, neque eorum axes omninò
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ſimili poſitione moueri poſſunt, & hinc enormes va
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rietates oriuntur; officit quoque agitatio partium̨
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eiuſdem aquæ quæ euitari ne quit, dum manus infrą
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aquam immerſæ emittere cylindros debent. </
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<
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difficultatibus territus, vt
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quã
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maximè obſtacula ef
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fugerem, elegi ſphærulas ex eodem ligno, aut ex
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plũ-bo
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bo</
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confectas, in quibus ob ſimilitudinem figurarum̨
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in qualibet earum circumuolutione oſcillationes non
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impediunt quin ſemper ſimili poſitione pilæ aſcen
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dant, vel deſcendant, & tunc ex repetitis ex perimen
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tis conſtat quod velocitates earum reuera inæquales
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ſunt, celeriorique motu maior pila fertur, quàm mi
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nor, ſed in minori proportione, quàm ſit ſubduplica
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ta altitudinum, vt noſtra theoria ſuadere videtur.
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Quia difficul
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tèr hæc iņ
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cylindris ex
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periri
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poſsũt
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ſed faciliùs,
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& rariùs in
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ſphæris iņ
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ijs noſtra
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abbr
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sẽ-tentia
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tentia</
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com
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probatur.</
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Cap. 11. gra
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uia in fluido
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velocitati
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bus inæqua
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libus ferri
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debere.</
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in valdè ra
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ris fluidis va
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rietates ali
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quæ contin
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gunt.</
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<
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non valdè
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abbr
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condẽſabilibus
">condenſabilibus</
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, vt eſt aqua, hydrargyrum,
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oleum, & alia ſimilia, ſed in aere rariſſimo, qui ex ma
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chinulis grandioribus, & valdè compreſſibilibus
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abbr
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cõ-ſtat
">con
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ſtat</
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>
, non nullæ irregularitates contingunt in motioni
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bus corporum per eum aſcendentium, vel
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deſcendẽ-tium
">deſcenden
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tium</
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; & hoc non fit eadem regula, ſcilicèt non eodem
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modo variètur motus
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ſolidorũ
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in principio aſcenſus,
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vel
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deſcẽſus
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, ac in progreſſu, &
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cõtinuatione
">continuatione</
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prolixa
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<
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eorũdẽ
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<
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motuũ
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, vt ſuo loco declarabitur. </
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Poſtquã
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<
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cõ-parauimus
">con
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parauimus</
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velocitates, quibus homogenea corporą
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aſcendunt, vel deſcendunt in fluidis, expendere vlti-</
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