Each fragment becomes converted into a perfect magnet; the part which originally had a north pole acquires a south pole at the fractured end, and the part which originally had a south pole, gets a north pole.
If we divide a magnet to the extreme degree of mechanical fineness possible, will the pieces possess magnetic powers?
Each fragment, however small, will be a perfect magnet.
Galvanism
What is galvanism?
It is the production of electrical disturbance by chemical action.
What is the most simple manner of illustrating the production of this electricity?
If we place a piece of silver on the tongue, and a piece of zinc underneath it, no effect will be produced as long as the two metals are kept asunder; but when their ends are brought together, a distinct thrill will pass through the tongue, a metallic taste will diffuse itself, and, if the eyes are closed, a sensation of light will be evident at the same moment.
To what is this result owing?
To a chemical action developed the moment the two metals touched each other.