| Year | 1925 |
| Date | 18-Jun |
| Volume | 52 |
| Issue | 1,260 |
| Page | 683 |
| Category | Workshop Topics |
| Part | |
| Title | A Detachable Back Gear for the 4-in. Drummond Lathe |
| Author | B.G. |
| Notes | Two views showing backgear in and out, back gear quadrant, elevations of quadrant, pulley and gears |