Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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bina circa
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<
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vtramq.
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ex
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tremitatem
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habẽs
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fora
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mina, qui
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bus toti
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dem collo
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pes, ſeu fu
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ſtes infigun
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tur, vt faci
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liùs iugum ipſum eorum beneficio cum opus fuerit conuer
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tatur, vt præ ſefert ſubſtrata figura. <</
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">Sucula item quamuis alia poſſit ſignificare, hic tamen
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machinam ſignificat tractorij generis, quæ ex tereti ligno,
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aut lignorum compagine conſtat, adiuncto axe ſuffulta
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æquidiſtante à plano horizontis, duobus, vel pluribus col
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lopibus pari longitudine vtrinque immobiliter adſtantibus
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tanquam rotæ radijs circa modiolum, quibus admota ma
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nu, ſucula ipſa circa proprium axem obuoluitur,
<
expan
abbr
="
funeq.
">funeque</
expan
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cir
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cumducto, pondera ſubleuat, vt præ oculis hic eſt videre
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in eius figura. </
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<
s
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">Quærit igitur Ari
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ſtoteles cur ſi lon
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giores fuerint collo
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pes facilius iugum
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circumagatur, quam
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ſi minores, ac bre
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uiores extiterint.
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</
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<
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abbr
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Itemq.
">Itemque</
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cur gracilio
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res ſucculæ facilius
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pariter ab
<
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abbr
="
eadẽ
">eadem</
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>
po
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tentia circumuoluantur, quàm craſſiores. </
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<
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N149E7
">Vtriuſque ſubin
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de cauſam eſſe inquit, quod in vtraque machina quilibet
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collops tanquam vectis ſe habet, cuius
<
expan
abbr
="
centrũ
">centrum</
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>
, ac fulcimen
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tum eſt in medio iugi, vel ſuculæ, ſiue in intimo axe coniun
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cto, aut ſaltem in ipſis concepto: potentia verò in extremi-</
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