| Year | 1950 |
| Date | 26-Oct |
| Volume | 103 |
| Issue | 2,579 |
| Page | 649 |
| Category | Workshop |
| Part | |
| Title | Lapping |
| Author | M.Hall |
| Notes | Lapping flat surfaces, loading the plate, a simple type of circular lap, an adjustable lap, circular lapping, internal laps, suggested stand |