Benedetti, Giovanni Battista de, Io. Baptistae Benedicti ... Diversarvm specvlationvm mathematicarum, et physicarum liber : quarum seriem sequens pagina indicabit ; [annotated and critiqued by Guidobaldo Del Monte]

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177165DE MECHAN. g.i. et .K: Quà propter augebitur virtus per numeros impares, hoc modo; Nam .g.
eſſet tertia pars reſiſtentię, quemadmodum prius media erat.
Idem infero de .m.n.
o.p.r.
et .s.
Sed cum oporteat pondus .q. tantum eſſe vt ſuffieiant reſiſtentiæ in .o. et .p.
ipſum ſuſtinere, idcirco ipſum pondus .q. ſubſeſquialter erit ponderi in .i. poſiti.
Qua-
propter .s. quinta pars erit ponderum .i. et .q.
Deinde ſi adhuc. duo diametri vnus in-
ferior, alter verò ſuperior additi fuerint cum pondere æquali .q. ad medium diame-
tri inferioris,
tunc pondus .s. erit ſeptima pars trium ponderum .i.q. & tertij additi, ex
239[Figure 239] ſupradictis rationibus.
Et quia virtus ſuſti
240[Figure 240] nens totale pondus trochleæ inferiori ap-
penſum in tot diuiditur partes æquales,
quot ſunt diametri orbiculorum trochleæ
inferioris, quando extremum immobile fu
nis alligatum fuerit trochleę ſuperiori, vt
puta in puncto .e. cum verò alligatum fue-
rit trochleæ inferiori, virtus primi diame-
tri .g.i.K. trochleæ inferioris ſemper ſeſqui
altera erit vnicuique aliorum diametrorum
ideò virtus reſiſtentię alterius extremi mo
bilis funis, puta .s. ſubmultiplex erit totalis
ponderis, eo modo quo diximus, cuius vir
tus, ſeu grauitas diuiditur ſeu diſtrubuitur
diametris inferioris trochleæ vt dictum eſt.
Depropria cauſa .24. quæſtionis.
CAP. XXII.
VEra cauſa effectus, qui vigeſimaquarta quæſtione exprimitur, adhuc à nemine
(quod ſciam) animaduerſa fuit, licet non ſit admodum ardua vel obſcura.
Ima
ginemur ergo duos circulos .c.f. et .b.g. concentricos, itaque; ſimul coniunctos, vt ſi ip
ſorum vnus feratur in orbem, alius quoque circumagatur, eo modo, quo curruum ro
tæ voluuntur.
Et imaginemur primò ſuper lineam .f.i. reuolui maiorem, & quando
idem circulus erit in .l. dictam lineam .f.i. tangere circunferentiam eiuſdem in pun-

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