| Year | 1955 |
| Date | 30-Jun |
| Volume | 112 |
| Issue | 2,823 |
| Page | 740 |
| Category | In the Workshop |
| Part | |
| Title | A Hydraulic Engine Governor |
| Author | Duplex |
| Notes | The construction, governor body, back view, sectional veiw, the pump body,chamber cover plate, idler and driving pinion assemblies |