Vitruvius
,
De architectura libri decem
,
1567
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338
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514.01.370
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370
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LIBER
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tur. </
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<
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xml:space
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">quoniam cum ſunis alter circa tympanum inuoluatur, & </
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<
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xml:space
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">ad ergatam referatur, conſequitur, ut inuolu-
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tus cum ſit, tympani, & </
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<
s
xml:id
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xml:space
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">axis uerſatione, funes obuoluti circa axem pariter extendantur: </
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>
<
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xml:space
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">& </
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<
s
xml:id
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echoid-s25622
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xml:space
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">ita leniter ma-
<
lb
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ximas moles extollunt. </
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>
<
s
xml:id
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xml:space
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">Quod ſi tympanum maius eſſet, ergata opus non eſſet. </
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>
<
s
xml:id
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echoid-s25624
"
xml:space
="
preserve
">nam homines tympanum cal-
<
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/>
cantes, magna onera leuarent, nam ea ratio est diametri rotæ ad diametrum axis, quæ eſt ponderis quod le-
<
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uatur ad preſſionem, & </
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<
s
xml:id
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echoid-s25625
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">uires hominum calcantium. </
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<
s
xml:id
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echoid-s25626
"
xml:space
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">Ideo uectes ergatarum longi eſſe debent, ut iuxta pro-
<
lb
/>
portionem longitudinis ſingula capita oneris pondus imminuant, unde ſi duplicentur ad dimidium onus dedu-
<
lb
/>
cent, quatuor ad quartam partem, ita ut ſi uecte cubitali quatuor homines centum pondo moueant, quatuor
<
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uectibus ſenum cubitorum, ijdem duo millia & </
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<
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<
s
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">pondo ſubleuabunt, dempto uectium pondere, quod
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omnino parum est. </
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<
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xml:space
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">Quod uero αμφιρευσιν, & </
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<
s
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">ωιτρόαν legitur, alij ex uetustis condicibus legunt αμφίεληραν & </
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<
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">***ί-
<
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xml:space
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">10</
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>
θεσιν. </
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>
<
s
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xml:space
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">ut ijs nominibus ſignificent tympanum, quod rudente inuluto tanquam ueſtiatur, apud Theonem inſpi-
<
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ritblibus in mentione eiuſdem tympani αμφιελίκτραν uidemus, cæterum non ſine ratione duo hæc nomina a
<
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Vitruuio poſita ſunt. </
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<
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xml:id
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xml:space
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">nam particulæ αμφί & </
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<
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">ώζί & </
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">***ι rem innuunt conſiderandam.</
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">Aliud machinæ tractoriæ genus. # Cap. V.</
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">ESt</
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& </
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<
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">aliud genus machinæ ſatis artificioſum, & </
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<
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">ad uſum celeritatis expeditum: </
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<
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">ſed in eo
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dare operam non poſſunt niſi periti. </
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>
<
s
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xml:space
="
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">Eſt enim tignum, quod erigitur, & </
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>
<
s
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xml:space
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">diſtinetur reti-
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naculis quadrifariam, ſub retinaculis chelonia duo figuntur, trochlea funibus ſupra che-
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lonia religatur: </
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>
<
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xml:space
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">ſub trochlea regula longa circiter pedes duos, lata digitos ſex, craſſa qua-
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tuor, ſupponitur. </
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>
<
s
xml:id
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echoid-s25644
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xml:space
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preserve
">Trochleæ ternos ordines orbiculorum in latitudinem habentes collocantur, ita
<
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tres ductarij funes in ſummo machinæ religantur. </
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>
<
s
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xml:space
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">Deinde referuntur ad imam trochleam, & </
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>
<
s
xml:id
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echoid-s25646
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">traij-
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ciuntur ex inferiore parte per eius orbiculos ſummos. </
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>
<
s
xml:id
="
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"
xml:space
="
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">Deinde referuntur ad ſuperiorem trochleam, & </
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>
<
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="
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="
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">
<
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traijciuntur ab exteriore parte, & </
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>
<
s
xml:id
="
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xml:space
="
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">per ſecundos orbiculos tradueuntur in exteriorem, & </
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>
<
s
xml:id
="
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xml:space
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">referuntur ad
<
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<
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xlink:label
="
note-514.01.370-06
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xlink:href
="
note-514.01.370-06a
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