| Year | 2011 |
| Date | 02-Dec |
| Volume | 207 |
| Issue | 4,418 |
| Page | 765 |
| Category | Stationary Engine |
| Part | 4 |
| Title | Armstrong's Hydraulic Pumping Engine |
| Author | Anthony Mount |
| Notes | Makes the cylinder covers, steam chest covers, valve rod and piston. Valve rod gland, piston rod gland, the crank |