Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 1: Opera mechanica
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HOROLOG. OSCILLATOR.
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modum ſuperiori propoſitione fuit oſtenſum. </
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<
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xml:space
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">Ergo, ſi fiat ut
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<
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">Decentro</
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<
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quadratum ex 19″′ {1/10} ad quadratum ex 60″′, hoc eſt, ut 36481
<
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ad 360000, ita 18 unciæ ad aliud, fient ped. </
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<
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<
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</
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<
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">lin. </
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<
s
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xml:space
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">6, altitudo deſcenſus perpendicularis, tempore unius
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ſecundi. </
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<
s
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"
xml:space
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">Cum autem pes Horarius ſit ad Pariſienſem, ut
<
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881 ad 864; </
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>
<
s
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"
xml:space
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">erit eadem altitudo, ad hanc menſuram redu-
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cta, proxime pedum 15 & </
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>
<
s
xml:id
="
echoid-s4140
"
xml:space
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">unciæ unius. </
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<
s
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echoid-s4141
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xml:space
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">Atque hæc cum
<
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/>
accuratiſſimis experimentis noſtris prorſus conveniunt. </
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>
<
s
xml:id
="
echoid-s4142
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xml:space
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">in
<
lb
/>
quibus punctum illud temporis, quo cafus finitur, non au-
<
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/>
rium aut oculi judicio diſcernitur; </
s
>
<
s
xml:id
="
echoid-s4143
"
xml:space
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">quorum neutrum hic ſa-
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tis tutum eſt; </
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>
<
s
xml:id
="
echoid-s4144
"
xml:space
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preserve
">ſed ſpatium deſcendendo peractum, alio mo-
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/>
do, quem hic exponere tentabimus, abſque ullo errore cog-
<
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/>
noſcitur.</
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>
<
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="
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xml:space
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</
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<
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<
s
xml:id
="
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xml:space
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">Penduli, ad parietem tabulamve erectam, ſuſpenſi dimi-
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/>
dia oſcillatio moram temporis, cadendo abſumpti, indi-
<
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/>
cat. </
s
>
<
s
xml:id
="
echoid-s4147
"
xml:space
="
preserve
">Cujus ſphærula, ut eodem momento ac plumbum caſui
<
lb
/>
deſtinatum dimittatur, utraque filo tenui connexa tenentur,
<
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/>
quod admoto igne inciditur. </
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>
<
s
xml:id
="
echoid-s4148
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xml:space
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">Sed prius, caſuro plumbo, fu-
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niculus alius adnectitur, ejus longitudinis, ut, cum totus
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exierit à plumbo tractus, nondum ad parietem illidatur pen-
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dulum. </
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>
<
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xml:space
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">Funiculi ejus caput alterum, regulæ chartaceæ,
<
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aut ex tenui membrana paratæ, cohæret; </
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<
s
xml:id
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echoid-s4150
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xml:space
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">ita ad parietem ta-
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bulamve applicatæ, ut trahentem funem facile ſequi poſſit,
<
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/>
rectáque ſecundum longitudinem ſuam deſcendere; </
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>
<
s
xml:id
="
echoid-s4151
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xml:space
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">eo loci
<
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tranſiens, quo penduli ſphæra ad tabulam accidet. </
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>
<
s
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xml:space
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">Abſum-
<
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/>
pto igitur funiculo toto, pars inſuper regulæ deorſum tra-
<
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/>
hitur à cadente plumbo, priuſquam pendulum ad tabulam
<
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/>
pertingat. </
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>
<
s
xml:id
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"
xml:space
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">Quæ quanta ſit pars, ſphæra fuligine leviter in-
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/>
fecta, regulamque præterlabentem ſignans, indicat. </
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>
<
s
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xml:space
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">Huc
<
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autem addita funiculi longitudine, ſpatium cadendo emen-
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ſum certò definitum habetur.</
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>
<
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<
s
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xml:space
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">Aëris autem occurſum, quaſi nullus eſſet in his intelligi-
<
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/>
gimus, ut menſura cadentibus corporibus præfixa cum ex-
<
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/>
perimentis exacte conſentiat. </
s
>
<
s
xml:id
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echoid-s4157
"
xml:space
="
preserve
">Nec ſane tantus eſt ille, ut in
<
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/>
altitudinibus his, quò aſcendere datur, ſenſibile diſcrimen
<
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/>
inducere poſſit; </
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>
<
s
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xml:space
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">dummodo ſolida corpora è metallo, aut, </
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