Barrow, Isaac
,
Lectiones opticae & geometricae : in quibus phaenomenon opticorum genuinae rationes investigantur, ac exponuntur: et generalia curvarum linearum symptomata declarantur
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<
head
xml:id
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style
="
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xml:space
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">Epiſtola; in qua Operis hujus Argumen-
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tum, & ſcopus brevitèr
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exponuntur.</
head
>
<
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<
s
xml:id
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xml:space
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">PErcontaris (amice cum primis chariſſimè) quid in
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Lectionibus iſtis jam prælo ſubditis præſtiterim, aut
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præſtare voluerim. </
s
>
<
s
xml:id
="
echoid-s58
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xml:space
="
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">reſponſo facilè defungi poſſem,
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/>
ea dicendo præſtita videri, quæ ſingularum initia
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pollicentur, è quibus inſequentium methodus, materiâ,
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ſcopus conſtare poterunt ipsâ delibanti. </
s
>
<
s
xml:id
="
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xml:space
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">verùm in ſummam,
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opinor, iſta contrahivis, & </
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>
<
s
xml:id
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xml:space
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">ſub unum aſpectum redigi. </
s
>
<
s
xml:id
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xml:space
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">id
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quidem ægrè poſſum, niſi (quod juxtà faſtidioſum ac
<
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longum eſſet) complura _Tbeoremata_ recitando; </
s
>
<
s
xml:id
="
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xml:space
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">ſed ut-
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cunque morem tibi geram, rerum capita ſuccinctè per-
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ſtringens. </
s
>
<
s
xml:id
="
echoid-s63
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xml:space
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preserve
">Generatim eò connitor, ut illam, quam tra-
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ctandam ſuſcipio, _Opticæ_ partem aliquatenùs promoveam,
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ejus imprimìs principia explicando; </
s
>
<
s
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xml:space
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">tum ab ipſis _Vtilia_
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_Conſectaria_ deducendo; </
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<
s
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xml:space
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">demùm præcipuos (quos animad-
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verteram) defectus ſupplendo, nec non _vulgatos errores_
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corrigendo. </
s
>
<
s
xml:id
="
echoid-s66
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xml:space
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">huc collimans, ſpeciatim primò receptas hy-
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potheſes ad examen revoco, quatenus admittendæ ſunt
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& </
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<
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xml:space
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">quomodò rectiùs intelligendæ edocere ſtudens; </
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>
<
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xml:space
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">tum è
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phyſicis ueriſimilibus cauſis ipſas eliciens ac aſtruens. </
s
>
<
s
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xml:space
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">quâ
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in parte mihi fidei multum attribui nolim; </
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<
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xml:space
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">quæ probabi-
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liora mihi viſa protuli, neutiquam verò talia, quibus ipſe
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magnopere conſidam. </
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<
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xml:space
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">valeant quantum valere poſſunt.
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</
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<
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xml:space
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">Saltem hypotheſes ipſas admitti peto, ceu experientiæ
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conſentaneas, nec à ratione quaquàm abhorrentes. </
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Hypotheſibus conſtitutis, ab iis proximè </
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