| Year | 1950 |
| Date | 14-Dec |
| Volume | 103 |
| Issue | 2,586 |
| Page | 926 |
| Category | Novices' Corner |
| Part | |
| Title | Calipers |
| Author | |
| Notes | Inside and outside calipers, thread calipers, marking-out tools, the pivot joint, jenny caliper, the setting machanism, types of firm and spring joints, construction of quick-acting adjustment nut, toolmakers calipers |