DelMonte, Guidubaldo, Mechanicorvm Liber

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9ferentiam AN maiorem portionem lineæ FG pertranſit (quod
ipſi
vocant capere de directo) quàm deſcenſus ex L in D per cir
cumferentiam
LD; cùm deſcenſus AN lineam CT pertranſeat,
deſcenſus
verò LD lineam PO; & CT maior eſt PO; rectior erit
deſcenſus
AN, quám deſcenſus LD.
grauius ergo erit pondus
in
A, quàm in L, & in quouis alio ſitu.
eodemq; prorſus
modo
oſtendunt, quò propius eſt ipſi A, grauius eſſe.

Vt
ſint circumferentiæ LD DA inter ſe ſe æquales, & à puncto
D
ipſi AB perpendicularis ducatur DR; erit DR ipſi CO æqua
lis
.
lineam deinde DR ipſa LQ maiorem eſſe demonſtrant. di­
cuntq
; deſcenſum DA magis capere de directo deſcenſu LD, ma
ior
enim eſt linea CO, quàm OP; quare pondus grauius erit
in
D, quàm in L. quod ipſum euenit in punctis NM.
Suppo­
ſitionem
itaq;, qua libram DE in AB redire demonſtrant, vt
notam
, manifeſtamq; proferunt.
Nempè Secundùm ſitum pon
dus
grauius eſſe, quanto in eodem ſitu minus obliquus eſt deſcen
ſus
.
huiuſq; reditus cauſam eam eſſe dicunt; Quoniam ſcilicet
deſcenſus
ponderis in D rectior eſt deſcenſu ponderis in E, cùm
minus
capiat de directo pondus in E deſcendendo, quàm pon
dus
in D ſim liter deſcendendo.
Vt ſi arcus EV ſit ipſi DA
æqualis
, ducanturq; VH ET ipſi FG perpendiculares; maior
erit
DR, quàm TH.
quare per ſuppoſitionem pondus in D ra
tione
ſitus grauius erit pondere in E.
pondus ergo in D, cùm ſit
grauius
, deorſum mouebitur; pondus verò in E ſurſum, donec li
bra
DE in AB redeat.
Cardanus primo de ſubtilitate. Ex 15. tertii.Cardanus. Cardanus. Iordanus propoſitio ne 4. Tartalea propoſitione 5. 34 Primi. Iordanus ſuppoſitione 4. Iordanus propoſitio ne 3. Tartalea propoſitio ne 5.
Cardanus.

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