| Year | 1944 |
| Date | 13-Apr |
| Volume | 90 |
| Issue | 2,240 |
| Page | 343 |
| Category | Workshop |
| Part | |
| Title | This Lapping Business! |
| Author | Edgar T.Westbury |
| Notes | Some practical advice on how to lap small petrol engine cylinders - and why. The expanding lap mounted on its mandrel in the lathe chuck, is lapping necessary? What is lapping? Components of simple expanding lap, length of lap |