| Year | 1922 |
| Date | 12-Oct |
| Volume | 47 |
| Issue | 1,120 |
| Page | 352 |
| Category | Radio Engineering |
| Part | |
| Title | Wireless Direction Finding |
| Author | Captain H. de A.Donisthorpe |
| Notes | Inverted "L" aerial, strength of signals in a certain direction, directional aerial and connections, construction of directional aerials |