Marci of Kronland, Johannes Marcus
,
De proportione motus figurarum recti linearum et circuli quadratura ex motu
,
1648
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ctu enim finiri ſonum conſtat. </
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<
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>Simili ergò modo fit, quem
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admodum ſi lamina incurvetur: quæ ſonum edit
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pars
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reflexa aliam partem tangat. </
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<
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>At ſi vitrum perforetur, nihil
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obſtat ille hiatus, quò minùs partes reliquæ ſonent. </
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<
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>Deinde
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experientia his adverſatur. </
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<
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>Nicolaus enim Florentinus ſer: 7
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ſum: 2. tract: 4. cap: 1. teſtatur in Reſtiario contrafiſſuram in
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parte oppoſitâ plagæ deprehendiſſe: Et Petrus Paw vidiſſe
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ictum os ſiniſtrum bregmatis, quo loco lamdoidi iun
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gitur: fiſſo ſyncipitis oſſe dextro, loco ita vicino ſuturæ coro
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nariæ, ut pars rimæ eò ſe extenderit. </
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<
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>Cùm
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de facto con
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ſtet, cauſam inquirimus. </
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>Certum eſt adimpulſum referri à pla
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gâ provenientem: at cur non in loco plagæ ſed huic oppoſito,
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à minori & iam attenuato impulſu hoc patitur?
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enim di
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ci poteſt ob debilitatem findi illam partem; quam impetus in
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venit minùs virium habere ad reſiſtendum: tenuiora enim
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firma interſunt oſſa, inter os ſiniſtrum bregmatis, &
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os ſyncipitis dextrum. </
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>Qui verò aërem illis cavernulis in
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cluſum huc accerſunt, ineptam pro ſe habent rationem: quia
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nimirum ex ictu commoveatur: & per totam cranij ſubſtan
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tiam pervagatus, in parte demum oppoſitâ allidatur:
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os illud findat. </
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>Quomodo enim aër in illis mæandris tortuo
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ſis,
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in ſe reductis moveri poteſt quantumuis impetuoſus?
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an non mille modis interciſus; dum vel allidit, vel reſilit, priùs
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deficiet? Deinde cùm aër ſit mollis & fluidus, nequit illum
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impetum ſuſtinere, aut conſervare: & eſto demus
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vi
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olentiâ irrure,
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obuiam fieri in parte oppoſitâ: an non
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ſuis viribus hac ratione occumbet; dum ipſe ſibi inſtat, & in ſe
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ipſum luctatur? An ergo dicendum in figura cranij ſphæroide
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ſitam eſſe cauſam? quòd partes ab extra preſſæ magis ſtipen
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tur,
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reſiſtant diviſioni: à centro autem facto motu à ſe </
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