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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page |< < (33) of 795 > >|
4733DE MAGNETE.11
# Lin. # gran.
# 6 # 131
# 4 # 172
# 0 # 340
22
# Lin. # gran. # repulſion.
# 6 # 25 {1/2} # 156 {1/2}
# 4 # 29 # 201
# 0 # 44 # 384
Attendens autem ad numeros, ſummam repulſionis exprimentes,
inter
eos &
diſtantias conſtantem proportionem non animadvertere
potui
, ſed ſi quædam obtineat, non erit alta, &
minor quam ſim-
plex
inverſa diſtantiarum, incipiendo ſupputationem a contactu ipſo:
nam 6. 4: : 201. 134. loco 156 {1/2}. tum 7. 6: : 156 {1/2}. 134 {1/7}. loco 139.
tum
10.
7: : 139. 97 {3/10} loco 111. tum 12. 10: : 111. 92 {3/4}. loco 94 {1/2}.
Attamen
non dubito, quin conſtans proportio obtineat inter diſtan-
tias
&
repulſiones, modo ſolæ, ſeparatæque ab omni alia cauſa
haberentur
, imo attractiones ſolæ etiam in conſtanti ratione eſſe poſ-
ſunt
, ſed turbantur forſitan a repulſionibus:
nam uterque polus Mag-
netis
vim repellentem æque oſtendit, ac attrahentem:
& idcir-
co
ex eodem polo vis attrahens &
repellens exibit: quando poli Mag-
netum
duorum ſibi amici obvertuntur, attractio præpollet repulſio-
ni
;
quando inimici ſe reſpiciunt poli, repulſio ſuperat attractionem;
quare
ſemper actio datur compoſita ex attractione &
repulſione: un-
de
proportiones duæ componentes actionem in Experimentis obſerva-
tam
, forent ex quantitatibus notatis extricandæ a ſe invicem, ut
ſolæ
haberentur, quod difficillimum erit;
nec prius veram propor-
tionem
attractionis &
repulſionis determinare poterimus. In hac
itaque
rerum caligine, præſtabit ſuspendiſſe adhuc judicium, &
can-
dide
memoraſſe obſervationes, ex quibus ſerior ſapientiorque ætas
multa
forte eruet, poſtquam plura data hoc in negotio acceperit:

Neque
noſtrum ſilentium dedecori erit, cum ſapientiſſimi Philoſophi
Florentini
de Magnete agentes, etiam Experimenta tantummodo at-
tulerint
, nihil ratiocinii addentes, neque ullas ex iis elicientes ſeque-
las
, ne ficta pro veris, ſive hypotheſin loco demonſtrationis darent,
carbonemque
pro theſauro relinquerent.

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