| Year | 1925 |
| Date | 14-May |
| Volume | 52 |
| Issue | 1,255 |
| Page | 543 |
| Category | Railway |
| Part | |
| Title | Model Automatic Railway Electric Light Signals |
| Author | James W.Bulman |
| Notes | Connections for a single line with two automatically signalled sections, general arrangement and details |