| Year | 1933 |
| Date | 30-Mar |
| Volume | 68 |
| Issue | 1,664 |
| Page | 303 |
| Category | Petrol Engine Topics |
| Part | |
| Title | Valve Operation |
| Author | Edgar T.Westbury |
| Notes | Valve location, valve and tappet layout in side-valve engine, valve rocker design, valve and push rod layout in overhead-valve engine, radial valves, rocker arrangement for narrow-angle radial valves, for wide-angle radial valves, alternative rocker gear |