| Year | 1956 |
| Date | 21-Jun |
| Volume | 114 |
| Issue | 2,874 |
| Page | 1,020 |
| Category | Workshop |
| Part | |
| Title | Take the Slip out of Ellipse |
| Author | Tarentford |
| Notes | Trammels that will make accurate ellipses. Preliminary details, stamp of craftsman, general constructional details, that difficult operation, carefully does it, the adjusting member, the closing member, first-class instrument |