Antennae

Discusses the development of the antenna, starting from the simple vertical wire of Dolbear. Within the limits of this paper the author feels it wise to confine himself strictly to the antennae of today, with perhaps a prophetic word as to the future. Today, we find in almost universal use some form of the vertical wire antenna of Dolbear. Disguised as this may be by conductor multiplication, and departures from the vertical in the shape of spreading and converging fans of wire strands, it yet remains essentially a simple electrical conductor, reaching away from the earth's surface into free space, the link between the telegraphic apparatus and the electrical waves.