Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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FH ad CE, ita hæc ad L, & vt CD ad K, ita hæc ad M, ſitque inter KM
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media proportionalis N, erit vt FH ad CE, vel CD ad M, ita AF ad
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AC; igitur AF eſt ad AC in ratione quadruplicata CD ad FG, id eſt,
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vt CD ad M, facilè autem invenitur FG, quia vt FH ad CE, ita CD,
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quam habeo ad K ; inter K & D invenio mediam proportionalem FG ;
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item inter K & M ſcilicet N. </
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<
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id
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">Sed hæc ſufficiant, jam ad ſuſceptum pro
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poſitum redeo, & quia omnia ſingularia explicari non poſſunt; fruſtra
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enim id fieret, mihi ſatis eſſe videtur, ſi vnum vel alterum ſingulare ex
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ponam. </
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<
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">Accipio igitur punctum in Æquatore 345. longitudinis, vt vi
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des in globo; cum circa illum tractum, celeberrimus ille fluvius, quem
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Amazonum vocant, ex Orientali Americæ ora in mare influat, & maxi
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mum ſtatis horis patiatur æſtum, qui ad 300. milliaria per alveum flu
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minis aſcendit; huic tractui Luna oritur in Meridiano longitudinis 75. &
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tunc maxima eſt preſſio circa tractum longitudinis 545. quæ ſenſim ver
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sùs Ortum decreſcit; quid mirum ergo, ſi versùs oram Guineæ ad Afri
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cam, mare intumeſcat? </
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<
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">Vbi præſertim Luna per 30. gradus versùs occaſum
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progreſſa eſt, vbi verò tandem pervenit ad grad. 345. tunc ibi maxima
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eſt aquarum elevatio; & quia longè ante aqua aſſurgere cœpit, ab eo
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ſcilicet momento, quo à grad. 75. Luna occaſum versùs progreſſa eſt, quid
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mirum ſi aſſurgens aqua in apertum & ſatis directum fluminis alveum ex
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currat? </
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<
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">In quem tamdiu excurrit; quamdiu aſſurgit aqua ad illam oram;
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hæc autem tamdiu aſſurgit, quamdiu preſſio decreſcit; hæc demum tam
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diu decreſcit, quamdiu Luna ad Meridianum longit. 745. accedit; vbi
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enim Meridianum illum attingit, maxima eſt aquarum elevatio, nec vltra
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preſſio decreſcit; ſed deinde creſcit preſſio, progrediente ad occaſum Lu
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na, idque continuè donec perveniat ad nonageſimum inde gradum, id
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eſt, ad longitud. </
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">grad. 255. hinc refluit aqua, non modò proprio acta
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pondere, ſed accedente majore vi preſſionis ſollicitata, idque, quam
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diu preſſio creſcit, vnde per ſe tamdiu fluxus durat, quamdiu refluxus,
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& hoc vt plurimum fieri ſolet, licet per accidens alter altero diuturnior ſit,
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de quo infra præterea progrediente Luna à gradu 255. ad 165. in hoc
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puncto erit maxima elevatio; igitur circulus maximæ preſſionis ſecabit
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Æquatorem in punctis 255. & 75. vt patet, at in iiſdem punctis circulus
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maximæ preſſionis Æquatorem ſecabat, quando Luna erat in gradu 345.
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igitur in eodem tractu maxima eſt aquarum elevatio; ſenſim enim ibi aſ
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ſurgit aqua, vbi ſenſim preſſio decreſcit; igitur dum Luna à puncto 255.ad
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punctum 165. progreditur, creſcit æſtus ad prædictam oram, & in fluminis
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alveum intrat. </
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<
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">Denique peracto circulo Luna redit ad grad.75. & tunc eſt
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maxima preſſio in dicto tractu 345. Vides quàm facilè cuncta hæc ex præ
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miſſis deducta præfato tractui applicentur. </
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Auguſt.
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<
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"> Duo mihi occurrunt difficilia; primùm eſt, ſita Luna in gradu
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longit. 345. circulum maximæ preſſionis Meridianum illum eſſe, qui
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Æquatorem ſecat in grad. 255. ac proinde per medium quaſi mare paci
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ficum ducitur; licèt autem hujus maris preſſio aliquem effectum habere
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poſſit, non tamen vllam vim derivare poteſt in oram maritimam, </
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