| Year | 2011 |
| Date | 12-Aug |
| Volume | 207 |
| Issue | 4,410 |
| Page | 234 |
| Category | Stationary Engine |
| Part | |
| Title | Armstrong's Hydraulic Pumping Engine |
| Author | Anthony Mount |
| Notes | Introduces his latest engine. General arrangement, side elevation, plan front and rear elevations |