| Year | 2021 |
| Date | 26-Feb |
| Volume | 226 |
| Issue | 4,659 |
| Page | 326 |
| Category | Stationary Engine |
| Part | 4 |
| Title | The Middleton Double 'Monitor' Type Engine |
| Author | Rodney Oldfield |
| Notes | Constructs another of Bob Middleton's small but interesting engines. Piston rocker arm and vibrating arm, crank rod rocker arm, crank rod, crank rod end to crank rod, pins for crank rod rocker arm, piston rod ends, crank rod, the crank connection to the vibrating arm, lining up the bearings |