| Year | 1922 |
| Date | 22-Jun |
| Volume | 46 |
| Issue | 1,104 |
| Page | 599 |
| Category | Workshop |
| Part | |
| Title | A High-Speed Treadle Drilling Machine |
| Author | W.H.Grayling |
| Notes | Details of framework, details showing construction, spindle bearing, arm and block carrying table, spindle, guide pulleys, freewheel pedal drive |