| Year | 1995 |
| Date | 03-Feb |
| Volume | 174 |
| Issue | 3,986 |
| Page | 173 |
| Category | Historic |
| Part | |
| Title | Leonardo da Vinci's File Making Machine |
| Author | Bernard R.Ambrose |
| Notes | Describes the manufacture. Base components, drive-shaft bearings, lantern-gear, drive-shaft and cam, winding drum, ratchet and handle, bench and lead-screw bearings, crown-wheel, file and file support, main-shaft bearings, main-shaft, hammer and shaft and trip-arm, driving weight, escapement and escapement bearings, finishing |