Huygens, Christiaan, Christiani Hugenii opera varia; Bd. 1: Opera mechanica

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210132CHRISTIANI HUGENII
DEFINITIO XIV.
11De centro
OSOILLA-
TIONIS.
SI fuerint in eodem plano, figura quædam, & li-
nea recta quæ ipſam extrinſecus tangat;
& per
ambitum figuræ alia recta, plano ejus perpendicu-
laris, circumferatur, ſuperficiemque quandam de-
ſcribat, quæ deinde ſecetur plano per dictam tan-
gentem ducto &
ad dictæ figur æplanum inclinato;
ſolidum comprehenſum à duobus planis iſtis, & par-
te ſuperficiei deſcriptæ, inter utrumque planum in-
tercepta, vocetur Cuneus ſuper figura illa, tan-
quam baſi, abſciſſus.
In ſchemate adjecto, eſt A B E C figura data; recta eam
22TAB. XXI.
Fig. 3.
tangens M D;
quæ vero per ambitum ejus circumfertur,
E F;
cuneus autem figura ſolida planis A B E C, M F G,
&
parte ſuperficiei, à recta E F deſcriptæ, comprehenſa.
DEFINITIO XV.
D Iſtantia inter rectam, per quam cuneus abſciſ-
ſus eſt, &
punctum baſeos, in quod perpen-
dicularis cadit à cunei centro gravitatis, dicatur
cunei Subcentrica.
Nempe in figura eadem, ſi K ſit centrum gra-
33TAB. XIX.
Fig. 3.
vitatis cunei, recta vero K I ad baſin ejus A B E C
perpendicularis ducta ſit, &
rurſus I M perpen-
dicularis ad M D;
erit I M, quam ſubcentri-
cam dicimus.
PROPOSITIO VII.
CUneus ſuper plana figura qualibet abſciſſus,
plano inclinato ad angulum ſemirectum,

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