CHAPTER IX
HOW WE CARRY MAN'S NEWS
THE SCRIBE'S NOTE ON CHAPTER NINE
The electron explains wherein its method differs from all other methods.
It is well known that within recent years the old iron telegraph wires have been replaced by much lighter copper wires; the electron explains the reason for this change.
It describes how the electrons manage to work the most widely used form of telegraph instrument, which is called the "Morse," after its inventor.
Here we find one of the practical applications of the electro-magnet described in the preceding chapter.