Gravesande, Willem Jacob 's
,
Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1
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PHYSICES ELEMENTA
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in extremo uno ad formam hemiſphærii formantur, ex-
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tremum alterum coni formam habet anguluſque m l n eſt
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centum graduum: </
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& </
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<
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">nonaginta graduum, in experimentis adhibui, ſed antepo-
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nendum vidi angulum centum graduum.</
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<
s
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xml:space
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">Pondera cylindrorum ſunt inter ſe ut duo, tria, & </
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<
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<
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.
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fig. 5.</
note
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diametri externæ ſeſqui pollicis ſunt, minor longitudinis eſt
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trium poll.</
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<
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">; repræſentatur ille in g, & </
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<
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borum ſectiones per axem videntur in G & </
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<
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cavitate utriuſque datur ad diſtantiam unius pollicis ab ex-
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tremitate unâ; </
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<
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">videntur hæ in a a, a a, & </
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pollicis, craſſities ligni in b eſt octavæ partis pollicis. </
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rem lignum habet craſſitiem in reliqua cylindri parte, ubi
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nempe cavitatem majorem circumdat. </
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<
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">Cavitas minor, ubi
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experimenta inſtituenda ſunt, argillâ repletur, & </
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<
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minet cultro ligneo abraditur, ut unita ſit ſuperficies in
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quam cylindri, ultimum memorati, in experimentis incur-
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runt; </
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<
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">in majorem cavitatem, minori aut majori copiâ ar-
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gilla intruditur pro diverſo pondere cylindro communican-
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do.</
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ſpenduntur. </
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<
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">Ductâ lineâ in ſuperficie cylindri cujuſcunque ut
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g ad axem parallelâ, in hac duæ tenues lamellæ perforatæ, aut
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exigui annuli, o, o, firmantur ut & </
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<
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dio. </
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">Foramina in lamellis o, o, non majora ſunt, niſi ut
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per hæc duplicatæ chordæ citharæ tranſmittantur.</
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<
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axes perpendicularibus à centris foraminum; </
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<
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cylindro D. </
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cent in h, h, ad diſtantiam trium partium quartarum poll.
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</
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<
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drorum cavorum, ſatis eſſe ſi hæc tantum obſerventur re-
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ſpectu lamellarum, quæ ad partem cavitatum minorum dan-
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tur.</
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