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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page |< < (373) of 795 > >|
387373DE MAGNITUDINE TERRÆ.11
Et angulus E R S # 25 gr. # 50 ſcr.
Et angulus R S E # 128 gr. # 22 ſcr.
Omnium ſumma 180 gr. 1 ſcr. Ubi duntaxat unum ſcrupulum \\ redundat. Sit itaque angulus R E S # 25 gr. # 49 ſcr.
Et angulus E R S # 25 gr. # 49 ſcr.
Et angulus R S E # 128 gr. # 22 ſcr.
Unde per doctrinam triangulorum quoque dabitur \\ E R diſtantia inter Leidam & Dordracum # 10633. # 1.
Et S R diſtantia inter Goudam & Dordracum # 5897. # 8.
III. Problema.
Triangulum E A R. Leida, Haga, Dordracum.
22
Per Cap. VI. Probl. VI. datur diſtantia inter Hagam \\ & Leidam E A # 4103. # 3.
Ex obſervatis autem angulus E A R # 85 gr. # 51 ſcr.
Et angulus A E R # 71 gr. # 31 ſcr.
Unde angulus quoque tertius datur A R E. # 22 gr. # 38 ſcr.
Namque Dordraco Hagam non vidi.
Atque inde per doctrinam triangulorum diſtantia \\ inter Dordracum & Hagam A R # 10112. # 7.
Et E R diſtantia inter Dordracum & Leidam # 10634. # 7.
Quam eandem antecedente Problemate invenimus. # 10633. # 1.
Differentia eſt vix duarum decempedarum, quæ omnino in tanto
intervallo nullius ſunt momenti.
IV. Problema.
Triangulum A E F. Haga, Leida, Roterodamum.
33
Per Cap. VI. Probl. VI. datur diſtantia inter Hagam \\ & Leidam E A # 4103. # 3.

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