| Year | 1920 |
| Date | 04-Nov |
| Volume | 43 |
| Issue | 1,019 |
| Page | 370 |
| Category | Workshop |
| Part | 4 |
| Title | Small Power Machine Shop Calculations |
| Author | Hubert Bentley |
| Notes | Drilling, Milling and Boring Machines. Drilling machines, the feed mechanism, milling machines, cutting speeds, etc., boring machines, boring and turning mill |