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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417403DE MAGNITUDINE TERRÆ.
Problema XI.
Tab. XV. fig. 10. Triangulum aie, Leida, Noortvicum,
Voorſcbooten.
11
Obſervatus eſt angulus a i e # 19 gr. 57?.
Angulus i a e # 38 gr. 58?.
Angulus i e a # 121 gr. 5?.
Datur latus e a in V problemate # 1268, 6, 3.
Hinc eruitur i e diſtantia inter Noortvicum & Lei- \\ dam # 2338, 2, 2.
XII. Problema.
Tab. XV. fig. 9. Diſtantia inter Leidam & Noortvicum alio
modo quæſita.
22
Aſſumta fuit baſis a e # 471, 5, 0.
Obſervatus fuit angulus o e a # 88 gr. 26?.
Angulus o a e # 68 gr. 50?.
Angulus a o e # 22 gr. 44?.
Unde eruitur latus a o # 1219, 6, 4.
Et latus o e # 1137, 7, 1.
In Triangulo a e u obſervatus eſt angulus u e a # 91 gr. 56?.
Angulus u a e # 67 gr. 4?.
Angulus a u e # 21 gr. 0.
Unde eruitur latus u e # 1210, 5, 0.
Datis vero lateribus o e, u e & angulo intercepto \\ oeu, datur recta ou # 2338, 0, 0
XIII. Problema
Tab. XV. fig. 11. Triangulum A E B, Haga, Leida,
Noortvicum.
33
Obſervatus eſt angulus A E B # 106 gr. 3?.

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