Full text: Musschenbroek, Petrus: Physicae experimentales, et geometricae de magnete, tuborum capillarium vitreorumque speculorum attractione, magnitudine terrae, cohaerentia corporum firmorum dissertationes

328. Problema XXXVI.
Triangulum R S F. Dordracum, Gouda, Rotterodamum.

Per Problema XVI datur R S diſtantia inter Gou- \\ dam & Dordracum # 5918, 9, 7.
Ex obſervatis autem angulus S R F # 54 gr. 0`;.
Angulus R S F # 48 gr. 5`;.
Unde reliquus R F S datur # 77 gr. 55`;.
Quare per doctrinam Triangulorum datur S F di- \\ ſtantia inter Goudam & Rotterodamum # 4899, 7.
Et R F diſtantia inter Dordracum & Rotterodamum # 4504, 2.

Deprehenditur diſtantia inter Goudam & Rotterodamum 9 per-
ticis longior, quam in Problemate XIX quod arguit errorem, ſed
exiguum, irrepſiſſe in calculum, quod ſacile evenire potuit quia
angulorum minuta ſecunda non accurate ope Inſtrumentorum ca-
pi poſſunt.

329. Problema XXXVII.
Triangulum R T F, Dordracum, Willemſtadium,
Rotterodamum.

Per Problema XXXVI datur R F diſtantia inter \\ Dordracum & Rotterodamum # 4504, 2.
Et ex obſervatis angulus F R T # 86 gr 19`;.
Angulus R T F # 41 gr. 10`;.
Unde reliquus R F T datur # 52 gr. 31`;.
Atque inde per doctrinam Triangulorum dabitur \\ R T diſtantia inter Dordracum & Willemſtadium # 5429, 8, 7.
Tum T F diſtantia inter Willemſtadium & Rottero- \\ damum # 6828, 5, 4.

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