| Year | 1920 |
| Date | 23-Dec |
| Volume | 43 |
| Issue | 1,026 |
| Page | 508 |
| Category | Internal Combustion |
| Part | 4 |
| Title | A Petrol Engine for the Lawn Mower |
| Author | F.Hall Bramley |
| Notes | The Cam Gear. The Clutch Mechanism and the Contact Maker: Conclusion. The clutch case, the sprocket wheel, the clutch control details, the contact breaker, lubrication |