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

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296191HOROLOG. OSCILLATOR.
X.
11De vi
CENTRE-
FUGA.
Si mobile in circumferentia feratur, circuitus-
que ſingulos abſolvat eo tempore, quo pendulum,
longitudinem ſemidiametri circumferentiæ ejus ha-
bens, motu conico circuitum minimum abſolveret,
vel duplicem oſcillationem minimam lateralem:
ha-
bebit vim centrifugam ſuæ gravitati æqualem.
XI.
Penduli cujuslibet, motu conico lati, tempora
circuitus æqualia erunt tempori caſus perpendicula-
ris, ex altitudine penduli filo æquali;
cum angu-
lus inclinationis fili, ad planum horizontis, fuerit
partium 2.
ſcrup. 54, proxime. Exacte vero, ſi
anguli dicti ſinus fuerit ad radium, ut quadra-
tum circulo inſcriptum ad quadratum à circumfe-
rentia ejus.
XII.
Si pendula duo, pondere æqualia, ſed inæquali
filorum longitudine, motu conico gyrentur, fue-
rintque conorum altitudines æquales;
erunt vires,
quibus fila ſua intendent, in eadem ratione quæ
eſt filorum longitudinis.

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