Descartes, René
,
Renati Des-Cartes principia philosophiae
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CLXI.
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Cur magnes nihil amit
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tat de ſuâ vi, quam
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vis eam ferro com
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municet b. </
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Et breviſſimo tempore iſta vis ferro accedit, quia
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particulae ſtriatae celerrimè per ipſum fluunt; ſed
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longâ morâ in eo confirmatur, quia quò diutius ra
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mulorum extremitates in unam partem flexae manſe
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runt, eò difficiliùs in contrariam reflectuntur.
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CLXII.
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Cur haec vis celerrimè
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ferro communicetur,
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ſed diuturnitate tem
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poris in eo confirme
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tur a. </
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Et chalybs iſtam vim majorem accipit quàm vilius
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ferrum, quia plures & perfectiores habet meatus, par
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ticulis ſtriatis recipiendis idoneos. </
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tiùs ſervat, quia ramulorum in iis meatibus promi
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nentium extremitates habet minùs flexiles.
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CLXIII.
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Cur chalybs ad eam
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recipiendam aptior
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ſit, quàm vilius fer
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rum b. </
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Et major ei communicatur à majore & perfectiore
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magnete: tum quia particulae ſtriatae, majori cum im
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petu in ejus meatus irruentes, ramulorum in iis pro
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minentium extremitates magis inflectunt; tum etiam
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quia plures ſimul eò ruentes, plures ejuſmodi
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ſibi aperiunt. </
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>Notandum enim eſt, plures eſſe tales
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meatus in chalybe, qui ſcilicet ex ſolis ferri ramentis
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conſtat, quàm in magnete, in quo multum e:ſt materiae
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lapideae, cui ferri ramenta infixa ſunt; atque ideò,
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cùm paucae tantùm particulae ſtriatae ex
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debili ferrum ingrediantur, non omnes ejus meatus
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aperiunt, sed paucos tantùm, & quidem illos, qui
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extremitatibus ramulorum quam-maximè flexilibus
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claudebantur. </
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CLXIV.
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Cur major ei commu
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nicetur à perfectiore
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magnete quàm à mi
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nùs perfecto c. </
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Unde fit ut etiam vile ferrum, in quo ſcilicet
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ramulorum extremitates ſunt valde flexiles, ab ipſâ
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Terrâ, magnete quidem maximo, ſed admodùm </
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