| Year | 1924 |
| Date | 16-Oct |
| Volume | 51 |
| Issue | 1,225 |
| Page | 427 |
| Category | Stationary Engine |
| Part | |
| Title | A Built-up Vertical Pop Valve Engine |
| Author | J.H. |
| Notes | Front view of simple experimental engine, belted up to permanent magnet generator for testing, illustrating action of valves, elevations and details |