3. 1296
Peter Peregrinus conducted
experiments of magnetism
and wrote the first treatise
describing existing
magnetic properties.
In 1269, he wrote a letter to a
friend discussing the
magnetism called "Epistle
of Magnete" which
explains how magnets
attract and repel each
other and how to identify
the poles of a compass.
4. 1296
Discovery of the Epistle of Magnete (compass):
Maricourt takes a stone, magnet, which one was
round and one needle that is guided immediately
by the action of the magnet. When the needle
stops, Maricourt draw a line on the lodestone
round. After repeating the operation on other
parts of the magnet and when it has drawn a
good number of them on its surface, the pattern
shown is that prove circles completely
analogous to the ground and cut into two
extreme points of the magnet. Surprised by
analogy with the Globe, called poles Maricourt
calls these two particular points of the magnet,
north pole and south pole. In subsequent
experiments found that the way that magnets
attract each other is determined only by the
position of its poles, as if these constituted the
seat of what was thought at the time was the
magnetic power. These concepts will play an
important role in the development of theories of
polarization later.
5. Conclusions i bibliography
Conclusions: We are
delighted to work these
last because we learned
new things, like, what can
make ra magnetite.
Bibliography: All the
information has been
drawn from Wikipedia.
