P H I L O S O P H I
1
E
Scilicet uc tellus aut I&va aut dextera ferri
Succrefcic venis , qux funt fine lege feraces
Hinc illin c ; ideo haud 'xquus deflexus ubique efl,
Una aut in regione plagas it femper in unas.
2 2 6
5
Denique contadtum. ferrutn a magnete,; fub Urfas
Tendit item., celfaque diu fi in turre locatum
Perftiterit; liquidein ferri convertitur ordo
Pundorum , quem fi reddas, ratione movendo
Deluper oppofita magnetem , vis nova ferri
2270
Am itte tu r, inerfque, velut fu it ante, manebit.
Quare non opus his nofcendis, e-xque plicandis
Tenuia perpetuo a magnete fluentia fludu
Corpora, non opus eft nucleum confingere magnum
Sub terra certis fc Cardinibus glomerantem;.
2275
Noltra fine his ratio expediet facile omnia prorfus.
Illa
c polis a lte r iu s , in im icus a lt e r i:
d u o poli am ici fe a t t r a h u n t , in i
m ici r e p e llu n t. E o d e m prorCus
p a & o .in illa co llo catio n e p u n c o
ru m e tiam fi d ifp o n a h tu rp c r eu n
d em a xem , h a b e n tu r c o m b in a -
t io n e s , q u x in d u cu n t aterad h o-
n e m in fu m m a v irium
q u x rc-
fu lcan t c x om n ib u s ordinatis p e r
tin e n tib u s ad om n es diftantias ,
h a b e n tu r a lix , q u x in d u cu n t rc-
p u lflo n c m , & a lix
in q u ib u s
vis evad it nulla o b clifio n cm c o n
tra riaru m .
P r x te re a m agn e s d irig itu r ad
fe p t e n t r io n e m , fed n o n ita a c c u
ra te , u t n o n h a b e a t d eclin atio
n e m alicubi ad o r t u m , alibi ad
o c c a fu m , E t q u id em ca ip fa d ire-
d lio eft v a r i a b i l i s , a c in e o d em
T e r r a lo c o d eclin atio ja m m a jo r,
ja m m in o r , jam e tiam m uta ta a b
o rie n ta li in o c c id e n ta le m , & vi-
c c v c r f a . A d ca p h x n o m c n a e x p li
ca n d a a d h ib c b a n tC a rc d ia n i e fflu
v ia m a g n ctica , q u x p e rp etu o ab
a lte r o T c r r x p olo ten dant ad al
te r a m , ^qax in co m o tu o c c u r
ra n t y o ris m agn cticis ita d ifp ofi-
t l$ , u t d u m ejus Vcluti im m a n is
fluvii riv u li cos p e r m e a n t , e a m
d ir c & io n c m i n d u c a n t , q u x varie
tur n o n n i h i l , v a ria to cu ffu ipfius
fluidi m a g n c tic i .
H a llc y u s c o n
finxit n u cle um
in d u f u m
o r b i
fp h x r ic o , q u o c o n fle t T e ll u s ,
cujus o r b i s , fivc c r u f l x in teriu s
c a v x nos in co lim u s fuperficiem :
intra c ju fm o d i c ru fla m ppfuit n u
cleum , qui h ab eat b in qs polos
a ttrah e n te s n o ftru m m a g n e te m :
cos po fuit n o n co n g ru e n te s c u m
polis x q u a t o r is c e r r e f lr is , q u a m
q b c a u ta m h a b c r r c c n fu it d eclin a
tio n em : u t v a ria tio n e m d eclin a
tionis e x p l i c a r e t , in d ux it m o tu m
ejus n u cle i circa p ro p riu m a x e m ,
q u o poli illi ipfi m u ta ta fu a pofir
tio n e m u te n t diredtio n em acus
m a g n e t ic x .E t q u id e m u traq u e cric
h y p o th e tis m ere a rbitrari^ , q u a
r u m p rio r e tiam , ut p leraque a
C a r tc fia n is a d h ib ita , ira v a g a ,
u t; n u lla m p h x n o m c n o r u m deter *
m in a tio n e m e x h ib e a t . S e cu n d a
e x h i b u i t ; nam is con quifitis in
cred ibili la b o re un d ecu n qu e o bfer-
v atio n ib u s; d ete rm in av e ra t ip fam
