| Year | 1943 |
| Date | 21-Oct |
| Volume | 89 |
| Issue | 2,215 |
| Page | 405 |
| Category | Letters |
| Part | |
| Title | Miniature Indicators |
| Author | W.Nicholson |
| Notes | Secretary Sheffield DSMEE, back and front views of optical indicator fitted to a model marine engine, indicator diagram showing leakage of steam past the piston |