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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EPISTOL AE.
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nionem, ſi quam fortaſſe ex
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ſcriptorum lectione
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circa ea, de qui-
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bus nunc ſum acturus.</
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Quemadmodum
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igitur ab hoc authore ter ſcriptum fuit de
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, ſiue
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erroribus Ephemeridum, & earum calculos ſequentium, & de ratione qua cognoſci
<
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poteſt ſitus & locus alicuius ſuperioris planetæ, diuerſus ab eo, qui ab ipſis Epheme
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ridibus aſſignatus eſt, ita diſputationem hanc meam diuidam in tres partes, quo ſci
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licet minus confusè, & magis diſtinctè à me ſcribatur,
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type
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, vt animaduer-
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tere potes, huius ſcriptoris intentionem, aliam non fuiſſe,
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<
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type
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, quod ſcripto
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res Ephemeridum diuerſimode eiuſdem temporis locum planetæ aſſignauere, &
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quod eum faciant modo nimium velociter currere, modo nimium in vno ſigno mo-
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rari, vt (exempli gratia) Martem interdum faciunt morari ſex, aut ſeptem menſibus
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in vno ſigno. </
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poſtea in cauſa eſſe ait, vt Aſtrologi indiciarij
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, & ſimul
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careant certis fundamentis rationum quibus futura indicent, & prædicant. </
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<
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xml:space
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">Primum
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ergo videndum eſt, quam rectè hic vſus ſit arte, & ſcientia, vt aliorum opiniones, &
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ſcripta redarguere poſſet. </
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<
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xml:space
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">Deinde videbimus quomodo verum ſit, & poſſibile id
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quod ab Aſtrologis hactenus creditum, atque traditum eſt, & qua ratione poſſint ſie
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ri veri calculi à peritis regularum ſcientiæ.</
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<
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xml:space
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">In primo igitur tractatu inſcripto Animadnerſiones, præſupponit Author pro-
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feſſores huius ſcientiæ neſcire inuenire vera loca planetarum, quia vtuntur Ephe-
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meridibus, in quibus eorum loca non rectè ſunt notata. </
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<
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xml:space
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">Quod ſecundum ipſum ori
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tur, ex errore calculatorum, ſeu computiſtarum, potius quam ex varietate tabula-
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rum, à quibus Ephemerides ſumptæ ſunt, hoc tamen verum non eſt, Ephemeridas,
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ſcilicet, ita inter ſe differre, ratione errorum computiſtarum tantummodo, ſed po-
<
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tius ratione ipſarum tabularum, & ſi interdum contingere poſſit error aliquorum mi
<
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nutorum, nec non graduum, non propterea Ephemerides ita ſpernendæ ſunt. </
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<
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">In
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multis enim calculis, tales errores excuſabiles ſunt, cum ab innumerabilibus propè
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accidentibus oriri poſſint, præſertim in calculis prutenicis.</
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<
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xml:space
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">Videatur deinde vbi is profert quinquageſimum enuntiatum centiloquij Ptole-
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męi, ſatis mendoſe. </
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<
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xml:space
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">Ptolemęus enim ibi ſic ait.</
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<
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">Non obliuiſcaris eſſe centum viginti coniunctiones, quæ ſunt in ſtellis erraticis,
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in illis enim eſt maior ſcientia eorum quæfiunt in hunc
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ſuſcipiendi incre-
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mentum, & decrementum.</
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<
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">Nam, neque eo in loco, neque alibi, Ptolemęus quidquam eius dicere voluit
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quod ab hoc profertur.</
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<
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">Pergatur poſtea in pag .2. & videbitur hunc exiſtimare abſurdum quod Saturni,
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& Iouis coniunctio vera anni .1563. potuerit eſſe in Leone ſigno igneæ triplicitatis
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cum eorum coniunctio vera anni .1544. fuerit in Scorpione, ſigno triplicitatis
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aqueæ, & cum coitus eorum anni .1583. futurus ſit in Piſcibus, ſigno pariter tripli-
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citatis aqueæ. </
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<
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<
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">Nam poſtquam duæ ſtellæ coiuerint, non prius ſub alio alterius triplicitatis ſigno
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inter ſe ſunt conuenturæ, quam per omnia ſigna quæ eiuſdem ternarij cum primo ex
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titerint prius
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. </
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">Ita ſentit Ptolemęus,
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non aſpernendi nominis
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Aftronomi.</
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<
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">Et
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Ptolemęus nunquam
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huius rei attigit, & quamuis Albumaſar
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& Alchibitius de eo
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, is tamen eosnon intellexit, cum illi ibi
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agant de </
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