DelMonte, Guidubaldo
,
Mechanicorvm Liber
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xlink:href
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036/01/069.jpg
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<
s
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">Habeat autem libra AB
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centrum C in ipſa libra, atq;
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in eius medio: erit C libræ
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centrum quoq; grauitatis;
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à quo ipſi AB, horizontiq;
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perpendicularis ducatur FC
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G. </
s
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<
s
id
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N11FBF
">ponatur deinde in B
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quoduis pondus; erit totius
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lb
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magnitudinis centrum gra
<
lb
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uitatis putá in E; ita vt CE
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<
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ad EB ſit, vt pondus in B ad libræ grauitatem. </
s
>
<
s
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">& quoniam CE
<
lb
/>
non eſt horizonti perpendicularis, libra AB, atq; pondus in B
<
lb
/>
in hoc ſitu nunquam manebunt; ſed deorſum ex parte B mouebun
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lb
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tur, donec CE horizonti fiat perpendicularis. </
s
>
<
s
id
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">hoc eſt donec li
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lb
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bra AB in FG perueniat. </
s
>
<
s
id
="
id.2.1.51.1.2.4.0
">ex quo patet, quolibet pondus in B
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lb
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circuli quartam ſemper deſcribere. </
s
>
</
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>
<
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type
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<
s
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">Sit autem centrum C in
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fra libram AB. </
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<
s
id
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N11FEA
">ſitq; DCE
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perpendiculum. </
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<
s
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">ſimiliter
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poſito in B pondere, cen
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lb
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trum grauitatis magnitudi
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lb
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nis ex AB libra, & ponde
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lb
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re in B compoſitæ in linea
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lb
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DB erit; vt in F; ita vt DF
<
lb
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ad FB ſit, vt pondus in B
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<
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place
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xlink:href
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ad libræ pondus. </
s
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<
s
id
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">Iungatur CF. </
s
>
<
s
id
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">& quoniam CD horizonti eſt
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lb
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perpendicularis; linea CF horizonti nequaquam perpendicula
<
lb
/>
ris exiſtet. </
s
>
<
s
id
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">quare magnitudo ex AB libra, ac pondere in B com
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lb
/>
poſita in hoc ſitu nunquam perſiſtet; ſed deorſum, niſi aliquid
<
lb
/>
impediat, mouebitur; donec CF in DCE perueniat: in quo ſitu
<
lb
/>
libra vná cum pondere manebit. </
s
>
<
s
id
="
id.2.1.51.2.1.5.0
">& punctum B erit vt in G, atq;
<
lb
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punctum A in H, libraq; GH non amplius centrum infra, ſed ſu
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lb
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pra ipſam habebit. </
s
>
<
s
id
="
id.2.1.51.2.1.6.0
">quod idem ſemper eueniet; quamuis mini
<
lb
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mum imponatur pondus in B. </
s
>
<
s
id
="
N12023
">ergo priuſquam B perueniat ad
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G; neceſſe eſt libram, ſiue trutinæ deorſum poſitæ, vel alicui </
s
>
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