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tEhsionem quamplurimam immittat: iAhoc enim pr^cipue vim consistere tumnos ipsi, tum alii omnes existimants in-tensio autem ipsa excidic per forami-na Peritreti. Is qui majorem intensio-nem immisturus est, neceste habebit fo-ramina Peritreti facere majora, aliterenim majorem intensionem non capient.Adeo ut supercilia circumdantia qu.x re-linquuntur, si omnino tenuia fuerint, nonsine causa infirma sint. Nam ipsum quhdem Peritretum latius sieri noii potest.Alioqui magnitudinis compositionemexcederet. Quamobrem ferreas regulassupponere conantur. Cum autem regula*tenues atque infirmsesiant propter locumubi funes intenduntur continuis ducti-bus, evenit ut regulis flexionem admit-tentibus superior Peritreti locus facileconteratur. Pneterea modiolorum fora-mina quX sunt Parastatarum &: Mesosta-tarum ad ipsas orbium vacuitates, nonmediocrem afferunt infirmitatem Ad ha:evero foramina vacuitatum qu£e densa fune& oblique excidentia, & qu£e parallelasunt vacuitatibus, fragile opus efficiunt.Cuncta enim parvis admodum ligni in-cisionibus continentur.Quamobrem mul-ta Peritreta, cum ne constructionis qui-dem intensionem fustinuiffent, contritasunt. Accipe enim pras oculis Peritretumseparatum a laterculo,necdum clavis con-fixum, nec ornatum, quale tibi spectacu-lum exhibebit, vacuum undique ac per-spicuum existens, &: foraminibus circuloscontinentibus densatum. Vide pnetereaattentius, quantam vim sustinere illud o-• porteat. Ita enim contemnenda tibi vide-bitur figura. Quare cum figura ob jamdicta imbecillis sit, Conantur artifices ar-cus ferreos circa tempora inflectentes cla-vis configere &c suppositoriis uti quemad-modum dico, 8 c trabeculas qux sunt submodiolis firmiores subjicere ; atque hu-jusmodi subsidiis conservare,qux &: sum-ptu non mediocri indigent, &: temporisspatio non exigüo in constructione. Hxccum ita sint, sumamus rursus difficultatesqux illis in constructione contingunt.Pri-mum quidem evenit ut intensio diutiffi-me fiat, dum funis contorquetur: eo quodsingillatim quidem pars ejus tendatur: inunaquaque autem intensione totus permodiolos evolvatur; fi£ut cisCä cxtrciiKisoras d amnum patiatur, & circa serras ip-sius Entonii pressum & fractum undique.Prxterca accidit ut instrumentorum in-tensio per feipfa fieri nequeat, sed indi-geat multis aliis instrumentis majoribusqux Entonia vocantur: hujusinodi autemtempora contingunt, quibus necessariocatapultarum usu opus habemus: fractis

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