| Year | 1990 |
| Date | 07-Sep |
| Volume | 165 |
| Issue | 3,880 |
| Page | 284 |
| Category | Nautical |
| Part | 10 |
| Title | Borderer. A twin cylinder marine steam engine design suitable for 1/2 in. to 5/8 in. Bore and Stroke |
| Author | John P.Bertinat |
| Notes | The cylinder block, these piston valves, the eccentrics and rods |