| Year | 1956 |
| Date | 12-Apr |
| Volume | 114 |
| Issue | 2,864 |
| Page | 590 |
| Category | General |
| Part | |
| Title | The Wheel's Greatest Rival |
| Author | C.E.Page |
| Notes | Tracked vehicles. Birth of modern steering, the Boydell-Tuxford traction engine, J.B.Diplock's Pedrail wheel, "steam horses", first "tractor", Caterpillar crawler-tractor, Burrell's of Thetford, it had "ankles" |