| Year | 1992 |
| Date | 18-Dec |
| Volume | 169 |
| Issue | 3,935 |
| Page | 756 |
| Category | Stationary Engine |
| Part | 5 |
| Title | Sally. The Stuart Models S50 Mill Engine |
| Author | Tubal Cain |
| Notes | A simple method for indexing six positions. Steam chest cover, cylinder covers, fixing holes, interval, historical note |