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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6551DE MAGNETE.11
45 # 4 # 30 # 40 # 51 # 3 # 0 # 25
48 # 3 # 50 # 30 # 54 # 2 # 35 # 20
51 # 3 # 20 # 20 # 57 # 2 # 15 # 15
54 # 3 # 0 # 15 # 60 # 2 # 0 # 0
57 # 2 # 45 # 15
60 # 2 # 30 # 0
Quia in his Experimentis non accurate videre poſſumus diſtantias
Magnetis ab acu;
juſſit Societas Regia, ut Nob. Brook Taylor caperet
experimenta alio &
clariori modo de viribus Magnetis, adeoque hic
ſubtilis egregiuſque Mathematicus poſuit acum in centro Quadrantis
prioris, &
Magnetem, cujus axis in plano horizontali jacebat, admovit
removitque ab Acu in linea recta, quæ cum naturali directione Acus
faceret angulum rectum:
tunc diſtantias menſurans perlineam inter
centrum &
Magnetem interjacentem; condidit ſequentem tabulam.
22
Diſtantia \\ in pedibus # Variatio \\ Acus
# Gr. # m.
1 # 81 # 45
2 # 58 # 0
3 # 30 # 0
4 # 16 # 0
5 # 9 # 20
6 # 5 # 35
7 # 3 # 30
8 # 2 # 20
9 # 1 # 35
Hæc Experimenta facta ſunt cum Magnete præſtantiſſimo Socie-
tatis Regiæ;
ſed quoniam in hiſce non obſervata fuit ſimilis poſitio
Lineæ, in qua movebatur Magnes verſus acum, quod erat admo-
dum neceſſarium, non multum ex his concludi poterat, obſervante
Whiſtono, qui idcirco alia experimenta de novo inſtituit:
imo ar-
bitror hiſce methodis nos voti compotes fieri non poſſe, uti pate-
bit ex ſcrupulo, quem in medium proferam, poſtquam Whiſtoni ob-
ſervationes annotavero.
Operæ pretium autem eſſe indicavi

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