Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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conſtipatio quædam aliquarum partium, aliarumque laxa
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tio in corporibus flexibilibus tanquam condenſatio, ac ra
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refactio. </
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<
s
id
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N14E1E
">Non enim poſſet continuum inflecti niſi partes il
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lius, quæ concauam ſuperficiem conſtituunt viciſſim conſti
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parentur; illæ verò quæ conuexam, laxarentur; ſeu quo fie
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ri poteſt extenderentur. </
s
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<
s
id
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N14E27
">Cumque ſenſim natura ab vno ad
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aliud in omnibus gradum faciat; hinc eſt, vt non in qualibet
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longitudine ſiue diſtantia æquè fieri poſſit inflexio, ſed lon
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gè facilius in ea, in qua paulatim procedendo, ita partes va
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lent curuari, vt ſingulæ à rectitudine non videantur recede
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lb
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re. </
s
>
<
s
id
="
N14E34
">Vt obſeruare eſt in portione, vel arcu alicuius magnæ
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circumferentiæ, qui videtur à linea recta differre. </
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<
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type
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<
s
id
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N14E3B
">His poſitis duplici etiam ex capite dicemus contingere,
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ligna quo longiora fuerint facilius inflecti. </
s
>
<
s
id
="
N14E40
">Primò namque
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hoc ipſo, quod longiora ſunt magis grauitant,
<
expan
abbr
="
maiorq.
">maiorque</
expan
>
con
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ſtituitur vis à quo procedit inflexio. </
s
>
<
s
id
="
N14E4B
">E contra verò quo bre
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uiora extiterint, eo minor eſt virtus huiuſmodi; quæ tandem
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ſi minor ſit minima, quæ ſufficere poſsit ad motionem, nullo
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pacto valet inflectere, vt patet in ſurculis calamis ac paleis,
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quæ cum leuitate materiæ, tùm breuitate corporis, graui
<
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tare non poſſunt quantum ſufficiat ad motum inflexionis.
<
lb
/>
</
s
>
<
s
id
="
N14E59
">Quod ſi breuitas ligni compenſetur magna craſſitiei, obſta
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lb
/>
bit ex alio capite ipſamet eadem craſsities propter maio
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rem multitudinem partium, quarum aliæ conſtipari, aliæ au
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tem laxari debent cum fit ipſa inflexio. </
s
>
<
s
id
="
N14E62
">Secundo verò nam
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quanto maior eſt longitudo ipſius flexilis, tanto minor con
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ſtituitur laxatio, & conſtipatio ſingularum partium, quæ ar
<
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cum inflexionis efficiunt, meliuſque valent ſenſim inflecti.
<
lb
/>
</
s
>
<
s
id
="
N14E6C
">Vice autem verſa, quò breuior eſt longitudo illius, eò magis
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lb
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ſingulæ partes curuari debent, vt totius continui fiat infle
<
lb
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xio. </
s
>
<
s
id
="
N14E73
">
<
expan
abbr
="
Ideoq.
">Ideoque</
expan
>
difficilius curuantur, & inflectuntur etiam ſi gra
<
lb
/>
cile ſit ipſum lignum, quod debet inflecti. </
s
>
</
p
>
<
p
id
="
N14E7B
"
type
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main
">
<
s
id
="
N14E7D
">Vtrum verò ſeruata eadem proportione craſsitiei ad lon
<
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gitudinem, æquè facilè inclinetur magnum, ac paruum, ſeu
<
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longum, ac breue, non ſatis videtur conſtare. </
s
>
<
s
id
="
N14E84
">Probabiliter
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tamen dici poteſt, ſpectandum primò eſſe qualitatem, ac di</
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>
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