and even earthquakes may occur without interfering with the wireless service, while any of the above disturbances usually suspend the wire business for days at a time, and communication is restored only after a considerable outlay of money,
In military operations portable outfits are used which may be set up, and messages transmitted and received upon a few minutes’ notice, while on the march or on the battle-field. Before the advent of wireless telegraphy, it was necessary to string wires over long distances and at great risk, and even then the enemy might at any moment cut the wires.
Now that wireless has entered the field of commercial competition with the trans-Atlantic cables, its progress will be watched with the greatest interest.
