| Year | 1927 |
| Date | 29-Dec |
| Volume | 57 |
| Issue | 1,390 |
| Page | 613 |
| Category | Internal Combustion |
| Part | 5 |
| Title | Some Notes on the Design of Small Petrol Engines |
| Author | J.Harrison |
| Notes | The influence of the tappet foot, types of tappet, the cam positions, the cam contour, the constant acceleration curve, the application of the formula, the application of the roller tappet, the curved-foot tappet, the mushroom tappet, the tangential cam |