Vitruvius - De architectura libri decem ad Caesarem Augustum, omnibus omnium editionibus longè emendatiores, collatis veteribus exemplis

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430408M. VITRVVII POLL. traiicitur in inferioris trochleæ foramen, vti æqualia duo capita ſint funis
cum erit extenſus, ibiq́; ſecundum inferiorem trochleam reſticula cir-
cundata & connexa, vtræq́; partes funis continentur, vt neq; in dextram,
neque in ſiniſtram partem poſsint prodire. Deinde capita funis referun-
tur in ſumma trochlea ab exteriore parte, & deiiciuntur circa orbiculos
imos, & redeunt ad imum, coniiciunturq́; infimæ trochleæ ad orbiculos
ex interiore parte, & referuntur dextra ac ſiniſtra ad caput ſummæ tro-
chleæ, circa orbiculos ſummos. Traiecti autem ab exteriori parte referun-
tur dextra ac ſiniſtra tympanum in axe, ibiq́; vt hæreant colligantur.
Tum autem circa tympanum inuolutus alter funis refertur ad ergatam.
& is circumactus tympanum & axem inuoluendo, funes qui in axe reli-
gati ſunt, pariter ſe extendunt, & ita leniter leuant onera ſine periculo.
Quod ſi maius tympanum collocatum, aut in medio, aut in vna parte ex-
trema habuerit ſine ergata calcantes homines, expeditiores habere po-
terit operis effectus.

IN CAPVT IIII. ANNOTAT.

Alter funís refertur ad ergatam. ] Ergata machina tractoria (quam
Aristoteles mechanicon quæstione XIII. ζυγὸμ, vt opinor, appellat) vel hoc à ſucu-
la differt, quod axe eſt recto, non iacente, porrectóue: vectib{us} enim ſicuti ſucula
verſatur, non id quidem brachiorum ductu, ſed obnitentib{us}, & ambientib{us} ve-
ctiarĳs. Itali arganum vocant. Suculam autem (Vt nihil prætermittam eorum, quæ
ad iuuãdos ſtudioſos facere video.) Aristoteles memorata quæstione ονομ dicit. Quin
& Galen{us} commentarĳs de fracturis ſecundo & tertio, ſcribit Hippocratem ονος
vocare axes, & ονίσκους axiculos, id eſt, vt interpretor, ſucul{as}. Hoc idem refert
in commentarĳs de articulis tertio, & quarto. Figur{as} ſubiunxi.

98[Figure 98]Ergatæ.

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