| Year | 1921 |
| Date | 29-Dec |
| Volume | 45 |
| Issue | 1,079 |
| Page | 579 |
| Category | Radio Engineering |
| Part | |
| Title | Latest Wireless Information |
| Author | |
| Notes | The Royal Society of Arts. The Wireless Society of London. Wireless Telephony in France. An Amateur Wireless Exhibition. A Wireless Telephone with a Ringing-up Device. The Seventh Instalment of Wireless Stations and their Call Letters. |