| Year | 2020 |
| Date | 28-Aug |
| Volume | 225 |
| Issue | 4,646 |
| Page | 313 |
| Category | An Engineer's Day Out |
| Part | |
| Title | The Cruquius Engine |
| Author | Roger Backhouse |
| Notes | Enjoys a day out to Haarlem in the Netherlands. Origins, building the engines, preparing the site and buildings, boilers, operation, pumps, operating cycle, valves and controls, the unique hydraulic lock, condenser, Cruquius in operation, afterwards, preservation, visiting, references, thanks |