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 figures

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424410DISSERTATIO
Problema XXVII.
Triangulum E I V, Leida, Harlemum, Vltra-
jectum.
11
Ex Problemate XX diſtantia E V inter Leidam & \\ Ultrajectum datur # 11589, 8.
Ex obſervatis autem angulus V E I # 77 gr. 51. 30``.
Angulus V I E # 67 gr. 51.
Et angulus E V I datur # 34 gr. 17`, 30``.
Unde eruitur I V diſtantia inter Harlemum & Ul- \\ trajectum # 12271, 1.
Atque diſtantia E I inter Harlemum & Leidam # 7055, 5, 4.
Quæ diſtantia eſt proxime eadem ac in Proble-
mate XXIV inventa eſt.
Problema XXVIII.
Triangulum E I O, Leida, Harlemum, Amſtelo-
damum.
22
Datur per Problema XXV diſtantia inter Leidam & \\ Harlemum # 7053, 4. 8.
Obſervatur Angulus O E I # 27 gr. 11`.
Et angulus E O I # 43 gr. 18.
Et angulus E I O # 109 gr. 31`.
Quare per doctrinam Triangulorum datur I O di- \\ ſtantia inter Harlemum & Amſtelodamum # 4698, 4, 8.
Angulos hos iteratis vicibus menſuravit inſtrumentis Snellius, \\ unde alios conſtituit, quam quidem in antiquo codice, in quo alia \\ methodo eos ſupputando deduxerat, & ideo magna inter hanc & \\ primam Snellianam menſuram intercedit differentia, exigua modo \\ inter noſtram & ultimam Snellianam, quæ eſt # 4695, 6.

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