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M CONSTRUCTIONE. 73

aliquis posuerit,quemadmodum habet fi-gura inferius delineata. Sint enim fquam-marum combinationes quibus superposi-ta est: littera A.

Id enim quod attrahit & corrigit, for-tius sit oportet illo quod attrahitur & cor-rigitur, ut per vim ac fortitudinem illudcontineat. Id enim quod non continet, &quod similem casum sortitur, qua rationecoget aliquid quod pari celeritate cumipso fertur?In his igitur non animadver-tunt se siigittationem quidem nullatenusadjuvare : incrementum enim sit juxta* celeritatem cubiti : demissionem vero ^erasu k-eorum violentam reddere. Multa: enim dinempotentiae*pari celeritate praedic«,quoties * craffita-sibi invicem juncta: fuerint, attracta: qui- tudincim -dem universe, antibasim faciunt pro vir- f arttute qua: ipsis inest : adeo ut magna vi-rium coacervatio fiat. Recidentes veronec a se invicem ullatenus discrepanticrassitudine pradita: , universa: simul se-runtur. Qua ratione igitur fieri potest, utceleritatem ab his accipiat una,qua: &ip-lasimilem habet celeritatem? Quando-quidem & in navigatione si tria fuerintnavigia paris *celeritatis v & unum ex illis *crajsux-a duobus trahatur,quod Lc ipsum simili se- ‘ff ntS , ,ratur celeritate qua navigia a quibus tra- cWTOhitur, celerius quam reliqua duo naviga-bit. Neque enim etiamsi vinculum laxa-verint, magis a tergo relinquetur, paremhabens * celeritatem. Ex hoc itaque ma- *crajfiw-nifeste probatur id quod dixi. Quamob- dinemrem unam conjugationem singulis cubi-tis subjiciendam esse affirmo , eamquequam fieri potest robustissimam ac firmis-simam tum fabricatione, tum xris tempe-ratione faciendam esse, sicuti supra scri-ptum est. Ac de Chalcotono quidem ins-trumento hactenus dictum sit.

Porro Dionysius quidam Alexandri-nus catapultam polybolon,seu multi jacu-lam Rhodiis construxit, qua: propriamquandam ac variam fabricationem habe- ,bat, de qua scribam, singula quaque de-clarans quanta potero diligentia.

Scopidium quidem quod ab illo indu-ctum est, magnitudine quidem non mul-tum excedebat cubitum, nec multo mi-nus erat tripalmi: sagittam vero emitte-bat longitudine cubiti ac pr^terea digitiunius. Erant autem sagitta: invicta: & tri- ^«7^-bus pennis alata: in tubum autem inji- ^ciebantur conferta: sagittet quanttecum- £53TOque preesto fuerint: & postquam retra-ctum fuerit chelonium, manus ipsa per sein altum sublata toxitidem apprehende-bat, & a schasteria sponte claudebatur.Postquam vero demissum fuerit, manushabens toxitidem,ex sagittis incidebat intoxitidem ; & cum prreterea paululum

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