Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica
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<
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<
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387
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0101
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rhead
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DE CIRCULI MAGNIT. INVENTA.
"/>
31415926538, major autem quam 31415926533 ad
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10000000000.</
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<
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echoid-s1977
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xml:space
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<
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<
s
xml:id
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echoid-s1978
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xml:space
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">Quos terminos ſi ex additis inſcriptorum & </
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>
<
s
xml:id
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echoid-s1979
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xml:space
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rum polygonorum lateribus inquirendum eſſet ferè ad late-
<
lb
/>
rum quadringenta millia deveniendum. </
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>
<
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echoid-s1980
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xml:space
="
preserve
">Nam ex ſexagintan-
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/>
gulo inſcripto circumſcriptoque hoc tantum probatur, mi-
<
lb
/>
norem eſſe rationem peripheriæ ad diametrum quam 3145 ad
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1000, majorem autem quam 3140. </
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>
<
s
xml:id
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echoid-s1981
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xml:space
="
preserve
">Adeo ut triplum & </
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>
<
s
xml:id
="
echoid-s1982
"
xml:space
="
preserve
">am-
<
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/>
plius verarum notarum numerum noſtro ratiocinio produ-
<
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/>
ctum appareat. </
s
>
<
s
xml:id
="
echoid-s1983
"
xml:space
="
preserve
">Idem vero in ulterioribus polygonis ſi quis
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lb
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experiatur ſemper evenire cernet: </
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>
<
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xml:id
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echoid-s1984
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xml:space
="
preserve
">non ignota nobis ratione,
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ſed quæ longiori explicatione indigeret.</
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<
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echoid-s1985
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xml:space
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</
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<
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<
s
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echoid-s1986
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xml:space
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lb
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arcuum quibus ſubtenduntur longitudo per hæc inveniri que-
<
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at ſatis puto manifeſtum. </
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>
<
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echoid-s1987
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xml:space
="
preserve
">Si enim quadrati inſcripti latere
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majores ſunt, longitudo arcus ad ſemicircumferentiam reli-
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qui inquirenda eſt, cujus tum quoque ſubtenſa datur. </
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>
<
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echoid-s1988
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xml:space
="
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">Sci-
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endum autem & </
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>
<
s
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="
echoid-s1989
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xml:space
="
preserve
">dimidiorum arcuum ſubtenſas inveniri cum
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totius arcus ſubtenſa data eſt. </
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<
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echoid-s1990
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xml:space
="
preserve
">Atque hâc ratione ſi biſectioni-
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bus uti placebit, poterimus ad omnem ſubtenſam, arcus i-
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lb
/>
pſius longitudinem quamlibet veræ propinquam non difficul-
<
lb
/>
ter cognoſcere. </
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>
<
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echoid-s1991
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xml:space
="
preserve
">Utile hoc ad ſinuum tabulas examinandas.
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</
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<
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echoid-s1992
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xml:space
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">Imo ad componendas quoque: </
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echoid-s1993
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">quia cognitâ arcus alicujus
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ſubtenſâ, etiam ejus qui paulò major minorve ſit ſatis accu-
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ratè definiri poteſt.</
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echoid-s1994
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53
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