Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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<
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">Præterea contra experientiam ſupponitur à Baldo, remi
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palmulam ceu centrum manere immotam in ipſa remiga
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tione, qua nauis fertur antrorſum. </
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<
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">Nam licet in vno caſu, vt
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quando remi manubrium motu proprio circa ſcalmum na
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uigium per impulſum acceptum in anteriora progrediens
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æqualia ſpatia pertranſierint, id verè poſſit contingere, vt
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optimè demonſtrat Petrus Nonius propoſit. </
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<
s
id
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">2. in ſequen.
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</
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<
s
id
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">problem. </
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<
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id
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">Ariſtotelis; nullo tamen modo poteſt veriſicari
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virtute eiuſdem tantum remigationis, de qua eſt nobis ſer
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mo; ſed virtute alterius etiam commotionis, aut impulſus,
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vt ſequenti quæſtione patebit. </
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<
s
id
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">Quare nihil ex eo colligi po
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teſt in propoſito contra Ariſtotelem. </
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<
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<
s
id
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">Demum nec minus contra experientiam eſt, per appul
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ſum palmulæ in B ad dexteram ſcilicet nauigij, ſcalmum
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D ferri in G, & ſcalmum C in F declinando totum
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ipſum nauigium dextrorſum per ipſos arcus DG, & CF.
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</
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<
s
id
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">Siquidem oppoſitum de facto contingit, etiam ſi palmula
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vbi B in ſcopulum appellat, vel immoto alteri corpori ad
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hæreat. </
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<
s
id
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N12EE3
">Videmus enim per impulſum remigum incuſſum
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in parte dextera ſcalmum, ac nauigium moueri ad ſiniſtram.
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</
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<
s
id
="
N12EE9
">Et ratio ipſa ſuadet, quia cum nauis ita ſupernatet in aqua,
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vt quoquo uerſum dimoueri valeat, quando nouam poſitio
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nem acquirit, per impulſum in vno tantum latere acceptum
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neceſſariò intelligitur conuerti circa centrum ſuæ grauita
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tis. </
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<
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id
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">Illiſa igitur palmula in aquam in parte dextera, ab
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">eaque</
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ob reſiſtentiam repulſa, non ſecus ac ſemidiametri extre
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mum, nauim tanquam circulum ad ſiniſtram mouebit.
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</
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<
s
id
="
N12F00
">Idem enim efficit aqua remigationi obſiſtens, ac ſi quis pal
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mulam repelleret in contrariam partem. </
s
>
<
s
id
="
N12F05
">Cumque talis
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remigatio fiat per modum circuli circa ſcalmum proceden
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do dextrorſum, ſequitur repulſum accipi, ac fieri per op
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poſitum procedendo ſiniſtrorſum. </
s
>
<
s
id
="
N12F0E
">Quamobrem ad hoc,
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vt nauigium rectà antrorſum procedat, ex vtraque parte
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ſimul remiges conantur impellere, vt ex vtroque motu cir
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culari, & contrario, reſultet vnus rectus, ac mixtus. </
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<
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id
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">Vt cer
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nere eſt in hac figura, in qua ſit remus AB, cuius manu</
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