Musschenbroek, Petrus van
,
Physicae experimentales, et geometricae de magnete, tuborum capillarium vitreorumque speculorum attractione, magnitudine terrae, cohaerentia corporum firmorum dissertationes: ut et ephemerides meteorologicae ultraiectinae
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INTRODUCTIO AD COHÆRENTIAM
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Eſt autem demonſtratum in Prop. </
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Gravitatis, in Conis & </
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dari in axe G E, ad {1/4} longitudinis G E a puncto baſeos E. </
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<
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re momentum Coni aut Pyramidis A G B erit = {aab/3} X {1/4}b.
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</
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xml:space
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">& </
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<
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xml:space
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">momentum Coni aut Pyramidis C G D erit = {bc
<
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/3a} X {1/4} {bc/4a}. </
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<
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momenta ſunt inter ſe veluti a
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ad c
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.</
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<
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<
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<
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">pyramidum ſunt inter ſe uti a a
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ad c c. </
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<
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">erunt momenta ex gravitate in ratione duplicata baſium
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conorum & </
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<
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<
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ſe uti a
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ad c
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. </
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<
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">erunt momenta ex gravitate ad Cohærentiam uti
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Surde ſolida ad Cubos.</
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re, quod ab extremo G geſtari poſſit, invenire maximum pondus,
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quod ab extremo C cjusdem Conitruncati C D B A geſtabitur.</
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centrum Gravitatis in cono truncato A B C D, cujus diſtantia a
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puncto E baſeos eſt = {4aab-4bc
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-9a
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b/4aa-4c
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}. </
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<
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">eſt autem pondus ipſius
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coni truncati = {aab/3}-{bc
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/3a}. </
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<
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= {4aab-4bc
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-9a
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b/4aa-4c
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} X {aab/3}-{bc
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/3a}
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Eſt quoque longitudo E f, ex qua pondus ſuſpendetur =b-{bc/a}.
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tum ejus = bx-{bcx/a}.</
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