| Year | 1940 |
| Date | 26-Sep |
| Volume | 83 |
| Issue | 2,055 |
| Page | 243 |
| Category | General |
| Part | |
| Title | A Sensitive Balance |
| Author | R.Harris |
| Notes | A useful piece of equipment for the photographer or amateur science worker. The completed balance, isometric view, assembly of baseboard, the beam, beam elevating mechanism, scale pan frame |