| Year | 1959 |
| Date | 22-Oct |
| Volume | 121 |
| Issue | 3,041 |
| Page | 296 |
| Category | Internal Combustion |
| Part | |
| Title | Unorthodox Internal Combustion Engines of Yesterday |
| Author | Edgar T.Westbury |
| Notes | Longitudinal section of the Vogt gas engine, first principles, pressure problems, Simon "Silent" gas engine, Bisschop vertical gas engine, Minerva double-acting gas engine, Gothic gas engine |