| Year | 1950 |
| Date | 17-Aug |
| Volume | 103 |
| Issue | 2,569 |
| Page | 233 |
| Category | Materials |
| Part | |
| Title | Transparent Plastics - Tubing |
| Author | W.D.Arnot |
| Notes | Curling perspex tube, making small tubes, allow for shrinkage, closing joint in thick-walled tube, flairing pipe joints |