| Year | 1952 |
| Date | 17-Jul |
| Volume | 107 |
| Issue | 2,669 |
| Page | 94 |
| Category | Workshop |
| Part | |
| Title | Drilling and Tapping a Square Column |
| Author | A.R.Turpin |
| Notes | The work held in a cross-slide toolpost, marking-out the centres, sequence of operations, a square bar machined between centres |