Clavius, Christoph
,
Geometria practica
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PRACTICÆ
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LIBER OCTAVVS.</
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demonſtrans.</
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">VT extremam manum Geometriæ huic noſtræ practicæ impona-
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m{us}, concludem{us} eam variis nonnullis Theorematib{us}, at que
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problematib{us} Geometricis, tum collectis ex Geometris aliis, tum
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proprio, vt aiunt, Marte excogitatis, ac demonſtratis. </
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<
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">Qua in
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re exemplum illuſtre habem{us} in Pappo Alexandrino, qui octo totos libros con-
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ſcripſit de Mathematicis collectionib{us}. </
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<
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">Neque vero hoc præter inſtitutum no-
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ſtrum exiſtimare quis debet: </
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<
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">cum per eiuſmodi demonſtrationes Geometric{as} ſtu-
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dioſo Lectori via multiplex aperiatur ad inueſtigand{as} ſimiles ſpeculationes in
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reb{us} Geometricis: </
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<
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">quippe cum in iis ad exercendum ingenium ampliſſimum
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campum habeat. </
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">alia cauſa, quæ me ad hunc librum octauum conſcri-
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bendum permouit, ne videlicet tot Theoremata, ac problemata non ſi{ne} magno
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labore perueſtigata pereant, cum ad nullam Geometriæ partem magis propriè
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pertineant, quam ad hanc Geometriam practicam: </
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<
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">præſertim quod pleraque
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c
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orum praxes Geometric{as} pertractent. </
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">Adde quod non pauci viri docti & </
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@es ad hunc librum perſcribendum auctores mihi, atque ſuaſores fuerunt.</
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quam circulus.</
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eſt prima propoſitio Archimedis in lib. </
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demonſtrat, hoc aſſumpto principio.</
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