| Year | 1940 |
| Date | 10-Oct |
| Volume | 83 |
| Issue | 2,057 |
| Page | 284 |
| Category | Lathe |
| Part | |
| Title | A Screw-Cutting Indicator |
| Author | E.Porter |
| Notes | Complete and in parts, on the lathe, the theory, a corner of the workshop showing various tools, revelation of the ubiquitous scrap box, the worm size, making the worm, two complete model engines, securing, trial trip |