| Year | 2001 |
| Date | 25-Jan |
| Volume | 187 |
| Issue | 4,161 |
| Page | 596 |
| Category | Beam Engine |
| Part | 3 |
| Title | Oliver Evans' Half-Beam Engine |
| Author | Colin Pape (France) |
| Notes | Details the beam and valve chest, makes elliptical rod glands. Radius link pillars, rocking column, valve stirrup, valve chest, glands, elliptical pices for the valve rod, slots for the wedges |