| Year | 2021 |
| Date | 13-Aug |
| Volume | 227 |
| Issue | 4,671 |
| Page | 258 |
| Category | Historic |
| Part | 24 |
| Title | The Stationary Steam Engine |
| Author | Ron Fitzgerald |
| Notes | The Seeds of a Bitter Conflict. Takes a look at the history and development of the stationary steam engine. 'Presbyterian Knave' Matthew Murray, reference |