Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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nubrium, quam ſcalmus eodem tempore ad impulsum il
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lius; nauis autem mouetur ad motum ſcalmi. </
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<
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N134ED
">Quod clarius
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patebit in ſubiecta figura; in qua ſit remus AB, cuius ma
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nubrium A, pal
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mula B, ſcalmus
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verò ſit in pun
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cto medio vbi C.
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<
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id
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N13502
">Deinde promo-
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ueatur manubrium
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A motu proprio
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vſque ad D, palmula manente in B. </
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<
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id
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N1350B
">Scalmus verò C,
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eodem tempore pertranſeat ſpatium CE, quod ſit æquale
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ipſi AD;
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expan
abbr
="
ſubtendanturq.
">ſubtendanturque</
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æquales rectæ ipſis arcubus AD,
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& CE, & conſtituatur paralellogrammum DECA, ſu
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per ipſum AB. </
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<
s
id
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N1351B
">Tunc dico ſcalmum C vnà cum nauigio
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tranſlatum non fuiſſe vſque ad E virtute ſola eiuſdem re
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migationis, ſeu proprij motus manubrij ab A vſque ad D,
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palmula manente in B. </
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>
<
s
id
="
N13524
">Siquidem hoc ſolo motu remus
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AB conſtitueretur in recta DB, cuius punctum medium
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vbi ſcalmus poſitus eſt eſſet in F, non autem in E, qua
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pertranſire non poteſt recta DB. </
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<
s
id
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N1352D
">Coincideret enim cum
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linea DE paralella ipſi AC;
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abbr
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proindeq.
">proindeque</
expan
>
per 35. definitio
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nem primi nunquam concurreret cum illa in punctum B,
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vbi ſupponitur palmula. </
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<
s
id
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N1353A
">Cum autem linea CF minor ſit,
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quàm CE, vel AD, quæſunt æquales: (Nam reſpectu
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vnius ſe habet tanquam pars ad totum, reſpectu verò alte
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rius, conſtituitur baſis anguli B, quæ per quartam propo
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ſitionem ſexti minor eſt quam baſis AD, quæ longioribus
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lineis continentibus ſubtenditur eidem angulo B) ſequitur
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per motum, quo manubrium ab A transfertur in D, ſcal
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mum cum naui pertranſire non poſſe ad æquale ſpatium
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vſque ad E. </
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<
s
id
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">Quod ſi illuc uſque pertingat, id certè contin
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gere debet virtute alterius impulſus aliunde incuſſi in
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abbr
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ipsũ
">ipsum</
expan
>
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nauigium. </
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<
s
id
="
N13559
">Qua virtute
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expan
abbr
="
eodẽ
">eodem</
expan
>
tempore ſimul ac manubrium
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motu proprio perueniſſet vſque ad D, reperiatur in G; &
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ſcalmus qui eſſet in F, pertingat vſque ad E; quod eſt </
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