| Year | 2021 |
| Date | 04-Jun |
| Volume | 226 |
| Issue | 4,666 |
| Page | 760 |
| Category | Railway |
| Part | 2 |
| Title | Lubrication |
| Author | Rhys Owen |
| Notes | Discusses friction and lubrication and how to get the oil where we want it. Displacement lubricators, hydrostatic lubricators, mechanical lubricators, references |