Biancani, Giuseppe
,
Aristotelis loca mathematica
,
1615
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s.004104
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<
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241
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009/01/241.jpg
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dimenſione, his verbis, extat, inquit, alius modus dimetiéndæ ſolaris eclyp
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ſis, omnium facillimus, ac certiſſimus, cuius nos admonuit Eraſmus Rei
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noldus in comm. in Theoricas Peurbarhij. </
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<
s
id
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s.004105
">tempore igitur ſolaris defectus,
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intra parietes vſpiam, clauſis omnibus feneſtris, admittatur Solis radius,
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per anguſtum foramen rotundum;
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abbr
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excipiaturq́
">excipiaturque</
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; radius hic in plana tabella,
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vbi certo quantum Sol defecerit ad vnguem, licet videre,
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abbr
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abſq;
">abſque</
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vlla intui
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tus moleſtia, ac tam perfectè, atque fi in cœlo coram adeſſes) hæc ille, licet
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autem videre, quia illuminatio in tabella excepta, quæ alias ſolet eſſe cir
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cularis, erit tempore eclypſis ipſa pariter cum Sole defectiua,
<
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abbr
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atq;
">atque</
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inſtar fal
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catæ lunulæ. </
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<
s
id
="
s.004106
">deinde ſubdit; verum hoc omninò ſcire neceſſarium eſt, con
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trario modo apparere defectum illum in tabula per radios Solis, quàm in
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cœlo contingit: hoc eſt, ſi in cœlo ſuperior pars deliquium patiatur, in ra
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lb
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dijs apparebit inferior deficere, vt ratio exigit optica)
<
expan
abbr
="
hucuſq;
">hucuſque</
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>
Gemma Fri
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ſius; ex quo etiam placuit accipere totius huius
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abbr
="
experiẽtiæ
">experientiæ</
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>
figuram, quam
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number
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149
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ipſe
<
expan
abbr
="
cuiuſdã
">cuiuſdam</
expan
>
eclypſis an
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lb
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ni 1544. apponit. </
s
>
<
s
id
="
s.004107
">eſt au
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tem hæc. </
s
>
<
s
id
="
s.004108
">in qua Sol
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expan
abbr
="
de-ficiẽs
">de
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ficiens</
expan
>
eſt A B C. pars in
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ferior B D P C, ipſa eſt
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lumine priuata; ſuperior
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B A P D, ſplendens, quæ
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ſimilis eſt falcatæ lunu
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læ. </
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>
<
s
id
="
s.004109
">radij Solis
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abbr
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ingrediũ-tur
">ingrediun
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tur</
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>
in cubiculum per fo
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ramen E.
<
expan
abbr
="
excipiunturq́
">excipiunturque</
expan
>
;
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in tabella K M N O, fo
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ramini, ſeu radio Solis
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<
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abbr
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perpẽdiculariter
">perpendiculariter</
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>
oppo
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ſita: in qua propterea
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apparet Solis illuminatio, non vt alias circularis, ſed manca, ac defectiua,
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lunulæ inſtar:
<
expan
abbr
="
eſtq́
">eſtque</
expan
>
; G H I L, quæ inuerſo modo ſe habet, ac in cœlo, quem
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admodum figura oſtendit: cuius cauſa eſt, quia radij Solis A E, D E, C E,
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poſt foraminis ingreſſum commutantur, quia ſe mutuò ſecant, vnde qui ſu
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periores erant, fiunt inferiores intra foramen, & in tabella; ſic radius A E,
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omnibus ſuperior, poſt ingreſſum fit omnibus inferior; eſt enim E H,
<
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abbr
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deſi-nitq́
">deſi
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nitque</
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>
; in puncto H, omnium illuminationis infimo. </
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>
<
s
id
="
s.004110
">reliqua autem pars cir
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culi illuminationis G L I F, deficit, quia pars Solis B D P C, quæ ipſam illu
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ſtrare ſolet, propter eclypſim nullos per foramen E, immittit radios. </
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>
<
s
id
="
s.004111
">Ve
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lb
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rum eclypſis tempore, etiam ſi huiuſmodi illuminationes intra cubiculum
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lb
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non obſeruentur, ſed foris, manifeſtè omnes apparent, non ſecus, ac ipſe ſol
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defectiuæ: tales ſùnt omnes, quæ per quælibet foramina, in quolibet paui
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mento, aut oppoſito pariete apparent: de quibus etiam Ariſtot. in præſenti
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problemate loquitur. </
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>
<
s
id
="
s.004112
">ex his facilè eſt verborum Ariſt. ſenſum aſſequi. </
s
>
<
s
id
="
s.004113
">Quæ
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rit igitur, cur tempore ſolaris deliquij, ſi Solis illuminationes per cribri fo
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ramina, aut inter alicuius arboris folia, ex ijs, quæ lata habent folia, aut
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inter manuum decuſſatos digitos, ingredientes, atque in terra </
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