THE LOADSTONE, OR MAGNET. 73

 

erful magnets is something like a horse-
shoe, and they are called horse-shoe
magnets. The power of the magnet is
called magnetism. There are a great
many mysteries about magnetism. We
can tell what the magnet does; but
we know very little about the reason
for its doing as it does.

Here is one of the strange things
about magnetism: If you place any
magnetized bars of steel among iron
filings, they will arrange themselves
around two points in the bar, and these
points will be determined according to
the shape of the bar of steel. These