| Year | 1990 |
| Date | 01-Jun |
| Volume | 164 |
| Issue | 3,874 |
| Page | 662 |
| Category | Nautical |
| Part | 5 |
| 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 | Valve gear for borderer, the eccentric rods and straps, the eccentric sheaves |