Vitruvius - L. Victrvvii Pollionis ad Cesarem Avgvstvm De architectvra

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# St aút ettā coclee ratio que magnam uim haurit aquæ ſed
# e # nó tā alte tollit ꝗ̃ rota. eius aút ratio ſic expedit́ tignú ſu
# mit́ cuius tigni q̃nta róne pedum longitudo tanta digi
torum expeditur craſſitudo. id ad circinum rotundat́ in capitibuſ
circino diuidentur circinationes eorum tetrantibus & octantibus
in pedes octo. hæ linee ita collocétur ut plano poſito tigno utri
uſ capitis ad libellam linee inter ſe reſpondeant & quāmagna ps
ſit octaue circinationis tigni tam magna ſpatia decidantur in lon
gitudinem. item in tigno plano collocato linee ab capite ad alterú
caput perducantur ad libellam co uuenientes ſic & in rotundatióe
& in longitudine æqualia ſpatia fient. ita quo loci deſcribuntur
linee que ſunt in longitudine ſpectante; ſa ient decuſſationeſ & in
decuſſationibus finita puncta. his ita emendate deſcriptiſ ſum: tur
ſaligna tenuis ut de uitice ſecta regula que iuncti liquida pice ſi
gitur in primo decuſſis puncto deinde traiicitur oblique ad inſe
quentes longitudines & circuitiones. item ex ordine progrediéres
ſingula puncta pretereundo & circum inuoluendo collocatur in
ſingulius decuſſationibus & ita peruenit & ſigitur ad eam lineam
recedeus a primo in octiuum punctum in qua prima pars eſt ei
us ſixa co modo quantum progreditur obligue ſparium & per oc
to puncta tantundem & longitudinem procedit ad octauum pun
ctum eadem ratione per omne ſpatium longitudinis & rotundi a
tis ſingulis decuſſationibus oblique fixe regule per octo craſſitu
dinis diuiſiones inuolutos faciunt canales & iuſtam coclee na'u a
lem imitationem. ita per id ueſtigium alie ſuper alias figunt́ un
cte pice liquida & exaggerantur ad id ut longitudinis octaua p@
fiat ſumma craſſitudo. ſupra eas circundantur & ſiguntur tabu: æ
que protegant eam inuolutionem. Tunc hæ tabulæ pice ſaturan
tur & laminis ferreis colligantur ut ab aque ui ne diſſoluantur ca
pita tigni ferrei. dextra aút ac ſiniſtra cocleā tigna collocant́ i cipi
tibus utra pte habétia trāſuerſaria cófixa. i his foramia feriea fút
incluſa in ea inducuntur ſtili & ita cocleæ hominibus calcanti
bus faciunt uerſationes. Erectio autem eius ad inclinationé ſic

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