Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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<
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pagenum
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17
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xlink:href
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025/01/021.jpg
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Sit igitur centrum mundi A, Axis
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mundi BC, diameter Æquatoris KF,
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diameter Tropici Cancri ID, Capri
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corni LH, Apogæum D, Perigæum L,
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mediocris diſtantia AQ, quæ diſpo
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ſitio fortè fuit anno mundi 5400. Sit
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angulus obliquitatis Zodiaci DAF,
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item HAF, ſupponamus Solem in
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Apogæo cum tali velocitatis gradu,
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quo circa Axem mundi æquabili mo
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tu ſuum orbem diurnum decurrit ab
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Ortu ad Occaſum, cum duplici in
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clinatione, altera ſcilicet versùs
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centrum A, ad inſtar motus accelerati,
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vſque ad mediocrem diſtantiam, &
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retardati ab hac ad Perigæum, atque
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ita deinceps; altera verò versùs E, ad
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inſtar pariter motus accelerati vſque
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ad Æquatorem, & retardati ab Æqua
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tore ad Tropicum, atque ita deinceps;
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cùm autem circuli ſint, vt diametri,
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vel ſemidiametri, erunt orbes decur
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ſi, ſi tamen decurruntur orbes, vt B
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D, AQ, CH; & cùm AQ, ſit haud
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dubiè major, quàm BD, maximus
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circulus decurritur circa Æquatorem
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quod certè in hac hypotheſi ſingulare non eſt, cùm etiam in Ptolemaica,
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& Tyconica locum habeat Dixi, cautè, ſi tamen decurrantur orbes, quia
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orbes non decurruntur, ſed ſpiræ, quæ ita componuntur, per majorem aut
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minorem diſtractionem, vt ſingulæ æquales ferè ſingulis evadant, dico
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ferè, quia non nego, aliquam ineſſe inæqualitatem, vt ſupra dictum eſt.
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</
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<
s
id
="
s.000220
">Finge igitur, ſepoſito motu circulari, Solem duplici inclinatione, eo modo,
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quo ſuprà dictum eſt, inſtructum, ite, ac redire, tum versùs centrum mun
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di A, tum à D ad E per arcum DE, & vtraque ſuo gaudeat acceſſu &
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receſſu; hoc quidem motum retardatum, illo verò acceleratum imitante,
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ſitque menſura acceſſus primæ inclinationis FQ, vel EV, & receſſus VH;
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Secundæ verò, acceſſus DF, & receſſus FE, atque ita viciſſim; finge igi
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tur, inquam, Solem ita moveri, ſepoſito motu circulari diurno; ibit haud
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dubiè per lineam curvam DQH. </
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Auguſtin.
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type
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</
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<
s
id
="
s.000222
"> Quis amabo ſciat, lineam illam curvam eſſe? </
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>
<
s
id
="
s.000223
">quid ſi dixe
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rim eſſe rectam in latere cylindri, vel coni? </
s
>
<
s
id
="
s.000224
">Deinde ſi curva eſt, quis de
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finiat, quæ & qualis ſit? </
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<
s
id
="
s.000225
">vide, quàm abſtruſa & obſcura nobis obtru
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das. </
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<
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type
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"/>
Antim.
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type
="
italics
"/>
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<
s
id
="
s.000227
"> Recta eſſe non poteſt in latere cylindri: ſit enim DE recta, ſi
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fieri poteſt; erit AE æqualis, AD; igitur Perigæum æquè diſtabit a </
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