| Year | 1990 |
| Date | 06-Jul |
| Volume | 165 |
| Issue | 3,876 |
| Page | 28 |
| Category | Steam |
| Part | 4 |
| Title | Pickering Governors |
| Author | Tubal Cain |
| Notes | The Pickering Governor for reciprocating steam engines, revealed in detail. Query from D.W.Broughton, Tubal Cain replies, working governors, force exerted by the balls, the leaf spring, a possible method to work |