Marci of Kronland, Johannes Marcus, De proportione motus figurarum recti linearum et circuli quadratura ex motu, 1648

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1forando: ne huius medulla nimiùm exæſtuet. Quæ autem
circulo finiunt: quia unâ inciſione auferunt quidquid inclu­
ditur illo circulo, unóque motu ſimplici peragunt inciſionem;
in hunc uſum veniunt.
Nam cùm in gyrum agitur hic cir­
culus; unaquæque particula incidit: & cùm aliæ eiuſdem rati­
onis ſequantur; vulnus continuò fit maius: atque eò magis,
quo θλίψις ſeu compreſſio maior, motus autem velocior.

Differt ab his terebellum, quo metalla perforantur. Stylus e­
nim αμφίζυς cylindro infixus veluti torno circumagitur, non
ſine compreſſione ad corpus terebrandum.
Qui motus
inciſione perficitur: duritiémque metalli ſuperat ob
illam velocitatem.
FINIS.
38[Figure 38]
PRAGÆ.
Ex Typographia Academica.
Anno 1648.
39[Figure 39]

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