| Year | 1941 |
| Date | 25-Dec |
| Volume | 85 |
| Issue | 2,120 |
| Page | 510 |
| Category | Workshop |
| Part | |
| Title | The Production of Involute Gears and Gear Cutters |
| Author | Ian Bradley |
| Notes | The indexing and feed arrangement, the method of indexing without using a dividing-head, diametral pitch, diagram to illustrate symbols used in gearing |