Marci of Kronland, Johannes Marcus
,
De proportione motus figurarum recti linearum et circuli quadratura ex motu
,
1648
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ſapientiſſimam cerebrum non prorſus contiguum feciſſe: ve
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rùm aliquo interuallo inter os cranij & membranas relicto:
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quò nimirum aëri, quem arteriæ inſpirant, ſit locus:
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cerebrũ
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verò dilatari,
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contrahi valeat. </
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>Quod quidem ab aë
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ris,
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mutatione, fieri obſervamus. </
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<
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>Turget enim in ple
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nilunio cerebrum & veluti ebullit per vulnera: è contra in no
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vilunio ſubſidet, & à cranio notabili abeſt intervallo. </
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<
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>Cùm
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ergo ita habeat, optimè videtur natura cauiſſe; quò minùs no
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xa eò pertingat: impulſus enim per partes contiguas, non ve
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rò à ſe divulſas propagatur. </
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Dices. </
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>Cerebrum incubare oßis
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, & cum cranio per falcem fi
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bras〈qué〉 in ſuturam productas connecti: nihil ergo obſtat, quò minùs
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hac viá ſe inferat.
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>Reſpondeo quòd ſi percuſſio fiat in illâ parte, quâ cerebrum
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ſuſtinetur,
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eſtq;
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contiguum oſſi, non
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abſq;
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periculo fieri pla
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gam: unde plenilunij tempore, quòd calva cerebrum attingat,
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eiuſmodi ictus ſunt lethales. </
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>At verò illæ fibræ, quibus ce
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rebrum cranio ſe inſerit, & à quibus in æquilibri ſitu detine
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tur, via eſſe non poteſt irruenti plagæ: propterea, quòd hu
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iuſmodi ſuſpenſoria, nec dura nec rigida ſunt, ſed mollia &
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membranoſa filamenta: quæ tendi & laxari facilè poſſunt: pri
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uſquam ergo tractio aut pulſio fiat, in illâ relaxatione perit im
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pulſus. </
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>Deinde cùm impetus ſe gyrando, non niſi obliquè
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ſtringat illa filamenta, erit tenſio æqualis motioni illarum par
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ticularum, quæ ſolo tremore convelluntur: ac proinde inſen
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ſilis, nullam ergo violentiam adducet partibus medio loco ſi
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tis; quantumuis ictus
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quandoq;
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accidant graves. </
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<
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>Ita quidem
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res habet in fiſſurâ partis oppoſitæ: an verò alijs
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quoq;
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locis
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non quidem oppoſitis, verùm á plagâ aliquo modo diſiunctis </
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