1. A message transmitted by wireless telegraphy.

2. Voice radio, as opposed to wireless telegraphy, was first successfully tried in 1906, but the first broadcasting stations were opened in 1920, after the war.

3. Wireless telegraphy, the phonograph and the radio are based on this law.

4. Guglielmo Marconl, Italian physicist and pioneer in the use of wireless telegraphy, died in Rome.

5. The great law of vibration is based on like producing like. Like causes produce like effects. Wireless telegraphy, the phonograph and the radio are based on this law.

6. Marconi shares the Nobel Prize in Physics, with Karl Ferdinand Braun for their work in the development of wireless telegraphy .