| Year | 2023 |
| Date | 30-Dec |
| Volume | 230 |
| Issue | 4,707 |
| Page | 94 |
| Category | Historic |
| Part | 41 |
| Title | The Stationary Steam Engine |
| Author | Ron Fitzgerald |
| Notes | Matthew Murray and the Round Foundry (cont.). The last legal skirmish. Takes a look at the history and development of the stationary steam engine. Murray's patent 2531 of 1801, the concentric valve spindles and the wiper eccentric, Matthew Murray's concentric valve stems and valve gear using gears, references |