Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 1: Opera mechanica
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HOROLOG. OSCILLATOR.
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poris æquatoria quam ſubjicimus, intelligetur; </
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<
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.</
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uſum ejus oſtenderimus, qui eſt hujusmodi.</
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<
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xml:space
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">Accipiatur æquatio tabulæ, aſſignata diei qua primum
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cum ſole, ſive cum ſciotherico, horologium ut conveniret
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fecimus. </
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<
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xml:space
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">Itemque æquatio diei, qua quæritur quam bene
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ad dierum menſuram temperatum ſit. </
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>
<
s
xml:id
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echoid-s987
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xml:space
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preserve
">Quod ſi jam prior æ-
<
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/>
quatio major fuerit ſequente, ſuperare debebit hora auto-
<
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/>
mati horam gnomonis eo, quo inter ſe æquationes iſtæ dif-
<
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/>
ferunt. </
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>
<
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xml:space
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">At ſi poſterioris diei æquatio major inveniatur, erit
<
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exceſſus penes horam gnomonis, ſive eam quæ ex ſole ob-
<
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ſervatur. </
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<
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xml:space
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preserve
">Ut ſi, exempli gratiâ, die 5 Martii in eandem
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horam conveniant ſciothericum horologium atque automa-
<
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ton, cujus diei æquatio invenitur, in tabula, ſcrupulorum
<
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/>
primorum 3, ſecundorum 11. </
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<
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xml:space
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">lubeatque ſcire ejusdem menſis
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die 20, an automaton horas æquales rectè metiatur necne:
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</
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<
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xml:space
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">invenietur die poſteriori adſcripta æquatio ſcrupulorum pri-
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morum 7, ſecundorum 27. </
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xml:space
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">quæ quia ſuperat præcedentem
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ſcrupulis primis 4, ſecundis 16, debebit tanto ſerior eſſe
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/>
hora ſciotherici, quam quæ automato indicatur. </
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>
<
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xml:space
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">Unde, ſi
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diverſum reperiatur, facile inde colligetur, quantum in dies
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ſingulos exuperet automaton, aut retardet.</
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<
s
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xml:space
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">In computanda tabula hac duplicem cauſam adhibui, u-
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tramque Aſtronomis notam, Eclipticæ nimirum obliquita-
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tem; </
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xml:space
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">& </
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<
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xml:space
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">ſolaris motus anomaliam. </
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<
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xml:space
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">Quod cum ratio poſtulat,
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tum experientia quoque, his ipſis horologiis ſuperſtructa,
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quæque ſine his nequaquam haberi poterat, evincit; </
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xml:space
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doquidem, cum æquatione hìc propoſita, obſervationes ſo-
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lis, quas ſæpe per complures menſes, quotidie ad momen-
<
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tum quo meridianum circulum ſol occuparet, inſtituimus,
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planiſſime conſentire inventæ ſunt.</
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