DelMonte, Guidubaldo, Mechanicorvm Liber

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1104[Figure 104]
Sit vectis AB horizonti æquidiſtans, cuius fulcimentum C;
pondus autem BD, eiuſdem verò grauitatis centrum ſit ſupra ve
ctem vbi H: ſitq; potentia ſuſtinens in A.
moueatur deinde ve
ctis AB in EF, ſitq; pondus motum in FG.
Dico primùm mino
rem potentiam in E ſuſtinere pondus FG vecte EF, quàm potentia in
A pondus BD vecte AB.
ſit k centrum grauitatis ponderis FG;
deinde tùm ex H, tùm ex K ducantur HL kM ipſorum horizon
tibus perpendiculares, quæ in centrum mundi conuenient; ſitq; HL ip
ſi quoq; AB perpendicularis.
ducatur deinde kN ipſi EF perpen­
dicularis, quæ ipſi HL æqualis erit, & CN ipſi CL æqualis.
Quo­
niam enim HL horizonti eſt perpendicularis, potentia in A ſu
ſtinens pondus BD ad ipſum pondus eam habebit proportionem,
quam CL ad CA.
rurſus quoniam kM horizonti eſt perpendicu
laris, potentia in E pondus FG ſuſtinens ita erit ad pondus, vt
CM ad CE.
Cùm autem CN NK ipſis CL LH ſint æquales,
angulosq; rectos contineant; erit CM minor ipſa CL; ergo CM
ad CA minorem habebit proportionem, quam CL ad CA; &

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