Marci of Kronland, Johannes Marcus - De proportione motus, seu regula sphygmica ad celeritatem et tarditatem pulsuum

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1tus, quem grauitas inducit in lineâ bh, remotior à cen
tro, quàm in lineâ bi. Ducantur enim à centro a lineæ ai.
ab perpendiculares ad bi. bh, eritque; terminus motus gra
uitatis in i & h ob breuiſsimam diſtantiam, quæ eſſe po
teſt in illis lineis; quód ſi enim ex i moueatur in st, quia
illo progreſſu lineæ à centro ductæ fiunt majores, ma
jor enim as angulo recto ais ſubtenſa quam ai, mobile
motu naturali à centro magis abduceretur, quod fieri
nequit. Quia ergo linea αγ major eſt quàm linea ai,
erit linea abc dem multò major: igitur punctum h ter
minus motus in lineà magis inclinatà, majori, punctum
verò i terminus motus in lineà minús inclinatâ, minori
à centro abeſt interuallo. Quia vetò uterque; motus tam
per lineam ai quam per lineam ah eſt æqualis motui per lineam
perpendicularem ab, propterea quòd lineæ perpendi
culares as. ah utrumque; motum conjungunt per prop: 13.
erit motus at motui ab æqualis, ac proinde in tempore
æquali.

Propoſitio XVII.

Motus grauitatis ex eodem puncto per lineas ad horizontem in
clinatas in circulum terminatur, cuius diameter eſt diſtantia inter
illud punctum & mundi centrum.

MOueatur ex puncto b mobile ejuſdem rationis per
lineàs ad horizontem inclinat as bi. bh. bg. bf. &c.

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