| Year | 1937 |
| Date | 24-Jun |
| Volume | 76 |
| Issue | 1,885 |
| Page | 586 |
| Category | Testing |
| Part | |
| Title | X-Ray Work in Commercial Testing |
| Author | Geo. Gentry |
| Notes | The industrial X-ray screening unit supplied by Messrs Commercial X-Rays, radiograph of speedometer cable showing a break inside the sheath |