| Year | 1989 |
| Date | 07-Apr |
| Volume | 162 |
| Issue | 3,846 |
| Page | 459 |
| Category | Post Bag |
| Part | |
| Title | 7 1/4 in. Gauge Rack Railway - Standards |
| Author | Ken Swan |
| Notes | Pitch of rack teeth, pressure angle, pitch line of rack above rail level, dimensions of rack gear, rack for 7 1/4 in. gauge |