| Year | 1953 |
| Date | 05-Mar |
| Volume | 108 |
| Issue | 2,702 |
| Page | 309 |
| Category | Workshop |
| Part | |
| Title | Surface Finishing |
| Author | "Duplex" |
| Notes | Knurling, an improved form of knurling tool, operation, bolts and nuts, chamfering, screws, errors in fitting screw heads, commercial screws, finishing curved surfaces, finish of flat surfaces |