On the magnet, magnetick bodies also, and on the great magnet the earth: a new physiology, demonstrated by many arguments & experiments
History
On the magnet, magnetick bodies also, and on the great magnet the earth: a new physiology, demonstrated by many arguments & experiments
Magnetism -- Early works to 1800
The second toward a pole at seventy-seven
degrees is no motion, but is direction with respect to the pole of the
earth, or variation. The third and fourth are magnetick and are the same.
So he truly recognizes no magnetick motion except the Coition toward iron
or loadstone, commonly called attraction. There is another motion in the
whole earth, which does not exist towards the terrella or towards its
parts; videlicet, a motion of aggregation, and that movement of matter,
which is called by philosophers a right motion, of which elsewhere.
* * * * *
CHAP. II.
On the Magnetick Coition, and first on the
Attraction of Amber, or more truly, on the
_Attaching of Bodies to Amber_.
Celebrated has the fame of the loadstone and of amber ever been in the
memoirs of the learned. Loadstone and also amber do some philosophers
invoke when in explaining many secrets their senses become dim and
reasoning cannot go further. Inquisitive theologians also would throw light
on the divine mysteries set beyond the range of human sense, by means of
loadstone and amber; just as idle Metaphysicians, when they are setting up
and teaching useless phantasms, have recourse to the loadstone as if it
were a Delphick sword, an illustration always applicable to everything. But
physicians even (with the authority of {47} Galen), desiring to confirm the
belief in the attraction of purgative medicines by means of the likeness of
substance and the familiarities of the juices--truly a vain and useless
error--bring in the loadstone as witness as being a nature of great
authority and of conspicuous efficacy and a remarkable body. So in very
many cases there are some who, when they are pleading a cause and cannot
give a reason for it, bring in loadstone and amber as though they were
personified witnesses. But these men (apart from that common error) being
ignorant that the causes of magnetical motions are widely different from
the forces of amber, easily fall into error, and are themselves the more
deceived by their own cogitations. For in other bodies a conspicuous force
of attraction manifests itself otherwise than in loadstone; like as in
amber, concerning which some things must first be said, that it may appear
what is that attaching of bodies, and how it is different from and foreign
to the magnetical actions; those mortals being still ignorant, who think
that inclination to be an attraction, and compare it with the magnetick
coitions. The Greeks call it [Greek: êlektron][108] because it attracts
straws to itself, when it is warmed by rubbing; then it is called [Greek:
harpax][109]; and [Greek: chrusophoron] from its golden colour. But the
Moors call it Carabe[110], because they are accustomed to offer the same in
sacrifices and in the worship of the Gods. For Carab signifies to offer in
Arabic; so Carabe, an offering: or seizing chaff, as Scaliger quotes from
Abohalis, out of the Arabic or Persian language. Some also call it Amber,
Public-domain text, read in full here on John Shaqi.
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