| Year | 1940 |
| Date | 28-Mar |
| Volume | 82 |
| Issue | 2,029 |
| Page | 318 |
| Category | Lathe |
| Part | |
| Title | Internal Back-Gear for a Small Lathe |
| Author | William Barlas |
| Notes | Useful accessory. Carrier for locking-pin, locking-pin, spring for locking-pin, various components, hardening, fixed plate and pinion, assembly, locking the fixed plate, conclusion |