| Year | 1994 |
| Date | 21-Jan |
| Volume | 172 |
| Issue | 3,961 |
| Page | 100 |
| Category | Pump |
| Part | 8 |
| Title | Southworth Duplex Boiler Feed Pump |
| Author | John Bertinat |
| Notes | Describes the remaining components, final assembly and testing. Final details, additional features, displacement lubricator |