Vitruvius
,
M. Vitruvii ... de architectura libri decem, ad Augustum Caesarem accuratiß conscripti: & nunc primum in Germania qua potuit diligentia excusi, atq[ue] hinc inde schematibus non iniucundis exornati
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DE ARCHITEC. LIB. X.
"/>
uticongruẽtes, ita principia pariunt ad duos perfectus: </
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xml:space
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Græci ὑθ\’ν,αυ uocitant: </
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lant: </
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<
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rotationis, uerſationes onerum poſſunt facere leuationes. </
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<
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xml:space
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telligatur exponam. </
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chleis collocantur, per quos orbiculos funis circumactus directis ductio-
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nibus, & </
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<
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xml:space
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">in ſucula collocatus, uectium uer ſationibus onerum facit egreſ-
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ſus in altum: </
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<
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">cuius ſuculæ cardines, uti centra, porrecti in chelonijs, fora-
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minibus{qúe} eius uectes concluſi, capitibus ad circinum circumactis torni
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ratione uerſando faciũt onerum elationes. </
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<
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xml:space
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us uectis, cum est admotus ad onus, quod manuum multitudo non potest
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mouere, ſuppoſita uti centro cito porrecta preßione, quod Græci ὑϖο-
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μόχλιου appellant, & </
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<
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">uectis lingua ſub onus ſubdita, caput eius unius
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hominis uiribus preſſum, id onus extollit. </
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<
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xml:space
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">Id autem fit, quòd breuior pars
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prior uectis, ab ea preßione, quod est centrum, ſubit ſub onus: </
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<
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longius ab eo centro diſtans caput eius, per id cum ducitur, faciundo mo-
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tus circinationis, cogit preßionibus examinare paucis manibus oneris ma
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ximi pondus. </
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<
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xml:space
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">Item ſi ſub onus uectis ferrei lingula ſubiecta fuerit, ne ca
<
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put eius preßione imum, ſed aduer ſus in altitudinem extolletur, lingula
<
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fulcta in areæ ſolo habebit eam pro onere: </
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xml:space
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">oneris autem ipſius angulum
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pro preßione, ita non tam faciliter, quàm per preßionem, ſed aduerſus ni
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hilominus in pondus oneris erit excitatum. </
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<
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xml:space
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">Igitur ſi plus lingula uectis ſu
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pra hypomochlion poſita ſub onus ſubierit, et caput eius propius centrũ
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preßiones habuerit, nõ poterit onus eleuare, niſi (quemadmodum ſupra
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ſcriptum est) examinatio uectis longius per caput ne iuxta onus fue-
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rit facta. </
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<
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</
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collocata, & </
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">æquipondium in alter am partem ſcapi per punctauagan-
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do, quo longius, aut etiam ad extremum perducitur paulo, etiam pari pon
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dere amplißimam penſionẽ parem perficit, per ſcapi librationem et exa-
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minationem longius à centro recedentem. </
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<
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xml:space
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">Ita imbecillior æquipondij bre
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uitas, maiorem uim ponder is momento deducens, ſine uehementia molli-
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ter ab imo ſurſum uerſum egredi cogit. </
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rariæ maximæ gubernator anſam gubernaculi tenens, quòd οἶαξ à </
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