Peter Peregrinus conducted early experiments on magnetism in the 13th century and wrote the first treatise on magnetic properties called "Epistle of Magnete". In it, he described how magnets attract and repel each other and how to identify the poles of a compass. Later, Maricourt discovered that a magnetized needle pointed in a consistent direction when placed near a lodestone, and he identified the needle's orientation with the north and south poles of Earth. His experiments showed that a magnet's attraction and repulsion depended on the orientation of its poles. This understanding of magnetic polarity played an important role in later theories of magnetism.

1. 12961296

2. Presentació

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.
denomina a estos dos polos.

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.

6. 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.