| Year | 2012 |
| Date | 30-Dec |
| Volume | 208 |
| Issue | 4,420 |
| Page | 28 |
| Category | Stationary Engine |
| Part | 6 |
| Title | Armstrong's Hydraulic Pumping Engine |
| Author | Anthony Mount |
| Notes | Makes the slide valves and eccentrics. The eccentric sheave, slide valves, governor pulley, eccentric straps |