Magnets can be made by placing a magnetic
material such as iron or steel, in a strong
magnetic field. Permanent, temporary and
electromagnets can be made in this manner.
That's the boring technical information.
But for everyone else, magnets and magnetism
have an almost magical quality. They make
heavy metal objects dance and wiggle.
They have an attractive force that's invisible,
almost otherworldly. Weird stuff, but
compelling too.
There are many legends accounting for
the discovery of magnets. One of the most
common, is that of an elderly shepherd
named Magnes, who was herding his sheep
in an area of Northern Greece called Magnesia,
about 4,000 years ago.
It is said that both the nails in his
shoes and the metal tip of his staff became
firmly stuck to the large, black rock
on which he was standing. This type of
rock was subsequently named magnetite,
after either Magnesia or Magnes himself.
Stories of magnetism date back to the
first century B.C in the writings of Lucretius,
and the magical powers of magnetite are
mentioned in the writings of Pliny the
Elder.
For many years following its discovery,
magnetite was surrounded in superstition
and was considered to possess magical
powers, such as the ability to heal the
sick, frighten away evil spirits and attract
and dissolve ships made of iron!
People soon realized that magnetite not
only attracted objects made of iron, but
when made into the shape of a needle and
floated on water, magnetite always pointed
in a north-south direction creating a
primitive compass.
So next time you pick up a magnet, think
about its weird nature. And I'll bet you
also move it towards something made of
ferris metal. That's steel or iron to
you - the stuff that magnets simply love!
| About The Author
Nick Grains has a healthy obsession
for things that act funny - like
magnets! You can find out more at
his site dedicated to all things
magnets at: http://www.hot-magnets.info/.
|
This article was posted on September
26, 2005