| Year | 1991 |
| Date | 16-Aug |
| Volume | 167 |
| Issue | 3,903 |
| Page | 220 |
| Category | General |
| Part | 5 |
| Title | Trouble at T'Mill |
| Author | Fred Copeland |
| Notes | Governors for water powered installations and steam engines. Governors, stability of a governor, hunting - isochronism, see 172 3971 746 |