| Year | 1937 |
| Date | 01-Apr |
| Volume | 76 |
| Issue | 1,873 |
| Page | 299 |
| Category | Tool-Room Topics |
| Part | |
| Title | Spacing Holes on Circles |
| Author | R.Hutcheson |
| Notes | The geometry of holes spaced around a circle, setting-up buttons on a circle by means of slip gauges, diametrically opposite buttons, the "disc method of locating holes on a curcle |