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

Table of Notes

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page |< < (406) of 795 > >|
420406DISSERTATIO11
Angulus A E F # 53 gr. 40?.
Unde reliquus A F E dabitur # 36 gr. 2?.
Hinc per doctrinam Triangulorum dabitur quoque \\ A F diſtantia inter Hagam & Rotterodamum # 5639, 1.
Et E F diſtantia inter Leidam & Rotterodamum # 7000, 2, 9.
I n editione Snellii angulus E A F ponitur 39 gr. 53? . & A F E 86 gr.
27? . hos angulos retinuit Caſſini ut veros, iiſque innixus ſupputan-
do deprehendit Snellium erraſſe, diſtantiam enim E F fore 6386
perticarum &
A F, 5154 perticarum: cum igitur nimia ſit differen-
tia inter numerum Snellianum 6972, 3, ſuumque 6386.
concluſit,
&
recte, angulos fuiſſe male hic poſitos a Snellio, quod veriſſi-
mum eſt, ideo Snellius in iterata obſervatione angulos aliter po-
ſuit, quos hic aſſumſimus.
Problema. XIX.
Triangulum E S F, Leida, Gouda, Rotterodamum.
22
Per Problema XV datur E S diſtantia inter Leidam \\ & Goudam # 5918, 9, 7.
Ex obſervatis autem angulus S E F # 43 gr. 32?.
Angulus E S F # 80 gr. 0?.
Unde dabitur angulus E F S # 56 gr. 28?.
Atque inde per Triangulorum doctrinam dabitur di- \\ ſtantia inter Goudam & Rotterodamum S F # 4890, 8, 6.
Problema XX.
Triangulum E S V. Leida, Vltrajectum, Gouda.
33
Diſtantia inter Leidam & Goudam E S datur per \\ Problema XV. # 5918, 9, 7.
Et ex obſervatis angulus E V S # 27 gr. 45?.
Angulus E S V # 114 gr. 9?, 30?.
Angulus S E V # 38 gr. 5?, 30?.
Unde per doctrinam Triangulorum dabitur diſtan-

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