Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 1: Opera mechanica
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CHRISTIANI HUGENII
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cto ſuſpenſionis ad ſphæræ centrum diſtantia accipiatur,
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<
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<
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<
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.</
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ſphæræ autem magnitudo non definiatur proportione ad fili
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longitudinem, non erit certa menſura penduli cujus recurſus
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ſecunda ſcrupula metiantur; </
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<
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xml:space
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">ſed quo major erit ejus ſphæra,
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hoc minor invenietur menſura illa, inter centrum ſphæræ & </
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punctum ſuſpenſionis intercepta. </
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<
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xml:space
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">Quia in iſochronis pendu-
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lis, centra quidem oſcillationis à punctis ſuſpenſionum æ-
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qualiter diſtant; </
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<
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xml:space
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">amplius autem deſcendit centrum oſcilla-
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tionis infra centrum ſphæræ majoris, quam minoris.</
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<
s
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xml:space
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">Hinc neceſſe fuit illis, qui, ante hanc centri oſcillatorii
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determinationem, menſuræ univerſalis conſtituendæ ratio-
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nem inierunt; </
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<
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">quod, jam inde à prima Horologii noſtri
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inventione, nobilis illa Societas Regia Anglicana ſibi nego-
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tium ſumpſit, & </
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<
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xml:space
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">recentius doctiſſimus Aſtronomus Lugdu-
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nenſis, Gabriel Moutonus; </
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<
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">his, inquam, neceſſe fuit deſi-
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gnare globuli ſuſpenſi diametrum, vel proportione certa ad
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fili longitudinem, cujus nempe triceſimam vel aliam partem
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æquaret; </
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<
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xml:space
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">vel menſura quadam cognita, ut digiti vel polli-
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cis. </
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<
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xml:space
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">Sed hoc poſteriore modo, ponitur jam certi aliquid,
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quod id ipſum eſt quod quærendum eſt: </
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<
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xml:space
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">etſi ſcio vix ſenſi-
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bilem errorem fore, dummodo ſphæræ iſtam, quam jam di-
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xi, magnitudinem non multum excedant. </
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<
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">Priore autem
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poſſet quidem aliquo pacto res explicari; </
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<
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merandarum oſcillationum labor ſubeundus ſit, calculoque
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etiam utendum. </
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<
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">Quamobrem præſtat, centra oſcillationis
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adhibendo, certam rationem ſequi, nulliſque præter neceſ-
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ſitatem legibus obligari. </
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<
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quam exiguis potius utendum, quod illæ occurſu aëris mi-
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nus impediantur.</
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coni, cylindri, aliaque omnia ſolida, planaque, quorum
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centra oſcillationis ſuperius exhibuimus, ad hanc menſuram
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inveſtigandam, apta ſunt; </
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<
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">quoniam, à puncto ſuſpenſionis
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ad centrum oſcillationis, certum idemque omnibus iſochronis
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pendulis eſt intervallum. </
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<
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">Neque etiam illa duntaxat horolo-
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gia, quæ ſecunda ſcrupula aut eorum ſemiſſes ſingulis </
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