DelMonte, Guidubaldo
,
Mechanicorvm Liber
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& pondus in k appenſum. </
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id.2.1.161.8.1.5.0
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quòd ſi punctum C omnino fue
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rit immobile, moueaturq; ve
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ctis EC in NC; & diuidatur
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NC bifariam in L: erunt CL
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LN ipſis Ck KE æquales. </
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quare ſi vectis EC eſſet in CN,
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punctum k eſſet in L; & ſi du
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catur LM horizonti perpendi
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cularis, quæ ſit etiam æqualis
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kH; eſſet pondus A, hoc eſt
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punctum H in M. </
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<
s
id
="
id.2.1.161.8.1.6.0.a
">ſed quoniam
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potentia in F dum tendit ſur
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ſum mouendo orbiculum, ſem
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per mouetur ſuper rectam EFG,
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quæ ſemper eſt quoq; æquidi
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ſtans BC; neceſſe erit orbicu
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lum trochleæ ſemper inter li
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neas EG BC eſſe: & centrum
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k, cum ſit in medio, ſuper
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rectam lineam HkT ſemper
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moueri. </
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>
<
s
id
="
id.2.1.161.8.1.7.0
">Itaq; ducatur per L li
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nea PTLQ horizonti, & EC
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æquidiſtans, quæ ſecet Hk pro
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ductam in T; & centro T, ſpa
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tio verò TQ, circulus deſcriba
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tur QRPS, qui æqualis erit circulo CED; & puncta PQ tangent fu
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note247
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nes FE BC in PQ punctis. </
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<
s
id
="
id.2.1.161.8.1.8.0
">rectangulum enim eſt PECQ, &
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PT TQ ipſis EK kC ſunt æquales. </
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<
s
id
="
id.2.1.161.8.1.9.0
">deinde per T ducatur R
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TS diameter circuli PQS æquidiſtans ipſi NC; fiat〈qué〉 TO æqua
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lis kH. </
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<
s
id
="
id.2.1.161.8.1.9.0.a
">dum autem centrum k motum erit vſq; ad lineam PQ,
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tunc centrum k erit in T. </
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<
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id
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N14C4A
">oſtenſum eſt enim centrum orbiculi ſu
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per rectam HT ſemper moueri. </
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>
<
s
id
="
id.2.1.161.8.1.10.0
">idcirco vt centrum k ſit in li
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nea PQ ipſi EC æquidiſtante, neceſſe eſt vt ſit in T. </
s
>
<
s
id
="
N14C53
">& vt vectis
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EC eleuetur in angulo ECN, neceſſe eſt, vt ſit in RS, non au
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<
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note248
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tem in CN: angulus enim RSE angulo NCE eſt æqualis, & ſic </
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