| Year | 1923 |
| Date | 29-Nov |
| Volume | 49 |
| Issue | 1,179 |
| Page | 600 |
| Category | Workshop Topics |
| Part | |
| Title | Grinding Small Twist Drills |
| Author | |
| Notes | The shape of a twist drill point, the way to hold and apply the drill, practising holding the drill, making the clearance, the conical clearance of a twist drill, holding a small drill for hand grinding, approximate cone of clearance |