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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CORPORUM FIRMORUM.
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xml:space
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xml:space
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">& </
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<
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xml:space
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ex G vocato p. </
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<
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xml:space
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<
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xml:space
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horum ſumma = {aabb/12}+pb. </
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<
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xml:space
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">quia momenta hæc, tum momenta
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coni truncati ſimul cum pondere incognito ad Cohærentiam baſeos
<
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ejuſdem A B eandem debent habere rationem, debent momenta
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eſſe æqualia, adeoque {aabb/12}+pb = 4aab-{4bc
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-9a
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b/4aa-4c
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}
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X {aab/3}-{bc
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/3a + bx - {bcx/a} unde eruitur quantitas incognita
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x = {aabb/12} + pb - {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}/b-{bc/a}}.</
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ejuſdem materiæ & </
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xml:space
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">æqualium baſium, ſed diverſæ longitudinis,
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datoque maximo pondere Q appenſo ex longiſſimo cono A B G, in-
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venire pondus P, appendendum ex vertice K brevioris coni, quod
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etiam ſit maximum.</
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<
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2a. </
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xml:space
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</
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<
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xml:space
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<
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xml:space
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">ejuſque momentum ex gravitate
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= {acbb/24}. </
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<
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xml:space
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">momentum ponderis Q = qb. </
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xml:space
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={acd/6} ejus momentum {acdd/24} momentum ponderis P = d x & </
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<
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quia baſes conorum ponuntur æquales, erunt Cohærentiæ æquales,
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adeoque cum momentum in uno cono, quod oritur ex propria </
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