| Year | 1956 |
| Date | 28-Jun |
| Volume | 114 |
| Issue | 2,875 |
| Page | 1,083 |
| Category | Automotive |
| Part | |
| Title | To A Tolerance of 0.00002 in. |
| Author | A.B.Chadwick |
| Notes | High precision engineering in manufacture of oil engine injectors. The reason why, freedom from dust, miniature railways, inspection by microscope, correct lapping stone |