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

Table of contents

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[41.] PROPOSITIO XVIII.
[42.] PROPOSITIO XIX.
[43.] PROPOSITIO XX.
[44.] PROPOSITIO XXI.
[45.] PROPOSITIO XXII.
[46.] LEMMA.
[47.] PROPOSITIO XXIII.
[48.] PROPOSITIO XXIV.
[49.] PROPOSITIO XXV.
[50.] PROPOSITIO XXVI.
[51.] HOROLOGII OSCILLATORII PARS TERTIA.
[52.] DEFINITIONES. I.
[53.] II.
[54.] III.
[56.] PROPOSITIOI.
[57.] PROPOSITIO II.
[58.] PROPOSITIO III.
[59.] PROPOSITIO IV.
[60.] PROPOSITIO V.
[61.] PROPOSITIO VI.
[62.] PROPOSITIO VII.
[63.] PROPOSITIO VIII.
[64.] PROPOSITIO IX.
[65.] Conoidis parabolici ſuperficiei curvæ circulum æqualem invenire.
[66.] Sphæroidis oblongi ſuperſiciei circulum æqualem invenire.
[67.] Sphæroidis lati ſive compreſſi ſuperficiei circulum æqualem invenire.
[68.] Conoidis hyperbolici ſuperficiei curvæ circulum æqualem invenire.
[69.] Curvæ parabolicæ æqualem rectam lineam invenire.
[70.] PROPOSITIO X.
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11974CHRISTIANI HUGENII gens A B, eodem arcu C B major erit. quod erat demon-
11De motu
IN Cy-
CLOIDE.
ſtrandum.
PROPOSITIO XIX.
IIsdem poſitis, ſi tertia recta prioribus parallela
22TAB. VIII.
Fig. 5.
D K circulum ſecet, quæ tantundem diſtet ab ea
quæ remotior eſt à centro quantum hæc à reliqua
A F:
Erit pars tangentis in B, à parallela me-
dia, &
ultimo addita D K, intercepta, nimirum
B D, major arcu B C.
Hoc enim manifeſtum eſt cum B D fiat ipſi B A æqualis,
quam oſtendimus arcu B C majorem eſſe.
PROPOSITIO XX.
SI arcus circuli, ſemicircumferentia minor, A B,
33TAB. VIII.
Fig. 6.
in partes quotlibet ſecetur lineis rectis paralle-
lis, quæ &
inter ſe, & cum rectis ſibi parallelis
per terminos arcus ductis, æqualia intervalla con-
ſtituant, quales ſunt C D, E F, G H, K L &
c.
ducanturque ad terminum arcus alterutrum A, &
ad reliqua omnia ſectionum puncta rectæ circumfe-
rentiam tangentes, omnes in eandem partem, &

ut unaquæque occurrat proximæ dictarum paralle-
larum;
cujusmodi ſunt tangentes A C, D E, F G,
H K &
c. Dico has tangentes, dempta prima A C,
ſimul ſumptas, minores eſſe arcu propoſito A B.

Easdem vero omnes, non omiſſa A C, majores eſſe
arcu A B diminuto parte extrema N B, hoc eſt,
majores arcu A N.
Ponamus enim primo perallelarum aliquas tranſire ab

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