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ConjtmcVio Helepolü qm diciturCorvus.

H JEc Hclcpolis ex tfibus prsecipuiäpartibus constat : ex bafe formamcrucis proferente, & ex rhostaCe qüi ere-ctus est in medio > & ex ambulatione inIpeciem rostri , quo corvus etiam nomi-natur, & quo ad medium rhostacis alli-gata est, & ad hostilem murum protendi- 1tur, ita ut milites per eam facile invadantin murum. Et fupradicta quidem basiscompaginatur hoc modo.Trabes duo ma-ximo collocantur in linea recta, vel abOriente ad Occasum: duo autem alio iisimponuntur obliquo in medio, & crucisfiguram efficiunt. Et trabes quidem quLsunt in linea recta, longitudinem habentcubitorum circiter quindecim, latitudi-nem vero & craffitudinem non minoremquam octo digitorum: distant autem a feinvicem duobus cubitis. Pari modo alioduo trabes obliquo longitudinem qui-dem habent circiter cubitorum decem,latitudinem vero & crassitudinem circi-ter octo digitorum : distant autem a feinvicem trium cubitorum ipatio. Porrohoc quatuor ligna sibi invicem compagi-nantur per modicam incisuram,funibusinsuper inter fe juncta. Hunc in modumdescendentibus funibus in una ala crucisligneo circumvolvitur lignum quod infrajacetSc furgit per alteram axillam, quoproxima est illi. Deinde circumvolviturad lignum quod supra situm est,& descen-dit per aliam propinquam axillam crucis,& circumvolvitur ad aliam partem ejusligni quod infra positum est : & rursusper axillam furgens circumvolvitur lignoquod superne positum est ex alia parte:ita per axillas descendens subinde ac fur-gens, & circumvolutionem multiplicans,utile efficit ligamentum: non in crucisformam alligatum in medio, sed in or-bem circa crucem convolutum. Hujus-modi basi in crucis formam absoluta sub-jiciuntur quatuor partibus axes&juga. Ecunus quidem axis in anterioribus extre-mitatibus trabium rectilinearum subjici-tur ; alter vero in posterioribus, in quibusrota; immittuntur ex interiori trabiumparte : ad utrumque autem latus tra-bium obliquarum subjiciuntur juga,binaquidem in dextra extremitate, totidemvero in sinistra, a fe invicem distantiaminus quam cubiti spatio: in medio au-tem fui per brevissimos axes continentrotas, alteram quidem in dextra parte,alteram vero in lxva. Et exteriores qui-dem partes hujusmodi brevissimorum a-xiumfubject* fune exterioribus jugis per

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