| Year | 1920 |
| Date | 16-Sep |
| Volume | 43 |
| Issue | 1,012 |
| Page | 230 |
| Category | Workshop Topics |
| Part | |
| Title | Setting Up for Precision Drilling |
| Author | |
| Notes | Diagram showing staggered arrangement of screws on an eight-screw bell chuck, showing the setting for turning & drilling a model bell chuck |