ABSTRACT
Continuous waves are important because they are essential for wireless telephony. For communicating overland in civilised countries, and from land to land along the recognised routes of ocean travel, Wireless Telegraphy is in direct competition with the telegraph line and cable. The Cape telegraph line goes far north into Rhodesia, and the Egyptian telegraphs stretch southwards into the Soudan. At any rate, the track is to be bridged North and South, East and West, by Wireless Telegraphy is unaffected by the savagery of the land over which its messages are sped. As the name implies, “stretching a wire” is unnecessary in Wireless Telegraphy, though in order to understand the finer points of theory one needs to stretch the imagination a little. The use of the coherer was to put into operation a local battery and telephonic or telegraphic receiving set, and it did this in accordance with the movements of a Morse sounder or tapper at the sending station.
