| Year | 1970 |
| Date | 17-Apr |
| Volume | 136 |
| Issue | 3,391 |
| Page | 372 |
| Category | Hot Air |
| Part | |
| Title | A Robinson-Type Hot Air Engine |
| Author | Edgar T.Westbury |
| Notes | J.Steven's sub-atmospheric hot air enigne, water cooling, the Bradley Marine type hot air enigne, the Atkinson, other hot air engines, Heinrici engines |