| Year | 2023 |
| Date | 27-Jan |
| Volume | 230 |
| Issue | 4,709 |
| Page | 200 |
| Category | Historic |
| Part | 42 |
| Title | The Stationary Steam Engine |
| Author | Ron Fitzgerald |
| Notes | The Post-Patent Watt Engine. William Murdoch, the bell crank engine and the slide valve. Takes a look at the history and development of the stationary steam engine. The model of the bell crank engine built by William Murdoch (Science Museum Picture Library), Murdoch's reciprocating slide valve, patent drawing for Murdoch's semi-rotative slide valve, the 1783 version of the sliding valve, the hollow stem valve, the Bell crank engine as shown by Farey, references |