| Year | 1939 |
| Date | 11-May |
| Volume | 80 |
| Issue | 1,983 |
| Page | 541 |
| Category | Stationary Engine |
| Part | |
| Title | Two Simple Engines |
| Author | H.H.G. |
| Notes | Easily-made horizontal and vertical types with interchangeable parts, Layout scheme, cylinder, port face block, chucking method used for machining radius in port face block, component parts, cylinder covers, big end, flywheel, piston and rod |