Benedetti, Giovanni Battista de
,
Io. Baptistae Benedicti ... Diversarvm specvlationvm mathematicarum, et physicarum liber : quarum seriem sequens pagina indicabit ; [annotated and critiqued by Guidobaldo Del Monte]
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ad nos accedit: </
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<
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xml:space
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">cum punctum Zodiaci, quod tropicum hyemalem Capricorni nobis
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producit, reſpondeat puncto meridiani ſub terra, in quo Sol ſemel in die reperitur:
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</
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<
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xml:space
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">Quòd apertè norunt hi, qui ſub polo boreali conſtituti ſunt. </
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<
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facilè diſcerne
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re poſſumus, diem ſcilicet & annum, quaſi ſibi ad inuicem medio ſuarum partium
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reſpondere; </
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<
s
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xml:space
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">ſolſtitium inquam hyemale, mediæ nocti, æſtiuum meridiei, æquino-
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ctium vernale ortui Solis, autumnale occaſui. </
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<
s
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xml:space
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">Quam tamen ſimilitudinem, multò
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quam nos manifeſtius deprehendunt, hi qui (ut diximus) ſub polo borcali verſantur.</
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<
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<
s
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xml:space
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">Quod ſi quis dubitet hac ratione correcto anno, quo nam pacto ad calculos coe-
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leſtes motus medijs tabulis aſtronomicis hactenus in lucem æditis redigi poſſint, id
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facilimum ſanè erit, exempli gratia; </
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<
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xml:space
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">aliquis planetę ſitum, aut alicuius ſtellę fixæ, quo
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cunque die menſis anni correcti inuenire cupit, detrahat ex huiuſmodi
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dies
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21
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21.</
num
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ab Aera Chriſti, cum reſiduo ſupputet ſtellam, cuius ſitum ſcire deſiderat; </
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<
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pta quacunque tabula, ſupputatio erit exacta: </
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<
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xml:space
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">Cuius ratio cuilibet manifeſta erit,
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qui ſciet annum vt potè .1579. dierum .344. tantummodo conſtitutum fuiſſe. </
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<
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xml:space
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">Nam
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in ijſdem locis cœli prima die Ianuarij correcti, erunt ſtellæ quibus eſſe ſolebant .11
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Decembris præcedentis anni ex ſupputatione tabularum: </
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præterea via idem perfici poſſet inuentione omnium motuum cęleſtium ipſo princi
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pio anni .1580. correcti: </
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<
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">hoc ſtatuto, vt hi motus radices eſſent Aeræ
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Grego
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rij XIII. quod ſi alio
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quiſpiam motus cęleſtes ad calculos redigere voluerit,
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ſupputabit ab Aera huiuſmodi, quæ anno .1580. principium habuerit: </
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<
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xml:space
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">Quæ vt nobi
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lius nomen ſortiatur,
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merito ex nomine Gregorij. XIII. Pont. Max. appelletur;
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</
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<
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">exemplo antiquarum, quæ ex Principum nominibus ſunt appellate: </
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<
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">vt tanto Pontifi
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ci, cùm ex alijs multi, tum etiam ex hac non infima re, inter mortales immortale no
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men comparetur. </
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<
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">Ei verò ſummæ, quæ ex huiuſmodi Aera Gregoriana ex tabu-
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lis colligetur, ipſiuſmet Aeræ radices addantur, vt exactus calculus habeatur. </
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<
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xml:space
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">Et
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hæc ſit primæ ſententiæ noſtræ explicatio.</
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<
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<
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xml:space
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">Altera erit numerum dierum menſium anni alia ratione quam nunc ſe habeat, or
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dinandum eſſe: </
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<
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">nempe vt Ianuarius, Nouember
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December dies .29. ſinguli con
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tineant, Februarius, Martius, & October .30. </
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">Aprilis, Maius, Auguſtus, & September
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dies .31. Iunius, ac Iulius .32. atque id hac potiſſimum de cauſa, vt Sol unum
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ſignum calendis menſrum ingredi poſſit. </
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<
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">Nam detractis (ut dictum eſt) diebus .21.
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& reuocato ingreſſu Solis in principium Capricorni ad principium Ianuarij, in quo
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ſigno hac noſtra tempeſtate, Sol, dies propè .29. & quartam vnam verſatur: </
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<
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rius .29. dies continebit, exactis hiſce diebus, ingredietur Aquarium circa princi-
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pium Februarii; </
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<
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dimidio; </
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<
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">quare ſi Februarius erit .30. dierum, elapſis ipſis diebus, Sol ingredietur pi-
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ſces circa principium Martii: </
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">& ſic de cæteris.</
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<
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">Quamobrem ſi generali correctione annus emendandus erit, pulcherrimè acci-
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det, ſi menſes anni cum duodecim partibus cœleſtibus, itineris annui Solis, concor-
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dauerint; </
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aptè reſponderint. </
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<
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">Qua ex re, varię vtilitates promanabunt, pręſertim
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Nautis, Agricolis, Medicis, & alijs qui vera principia, & interualla temporum per
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ſpecta habebunt: </
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<
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">terminos item & interualla incrementi & diminutionis dierum &
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noctium, & eorundem æqualitatis. </
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<
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">Exempli cauſa, ſcient omnes principium Ianua-
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rij, eſſe non modo anni principium, verum etiam hyemis, eſſe minimam anni diem,
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& eius noctem maximam; </
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<
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<
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etiam omnia illa, quæ ex huiuſmodi conuerſione Solis ad nos dependent. </
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<
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ſcient omnes primam diem Iulij, non tantum æqualiter annum diuidere, ſed prin </
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