From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Request to take photomicrographs of attached petrol filter gauges.
| Identifier | ExFiles\Box 135\2\ scan0174 | |
| Date | 20th February 1940 | |
| 1138. To HC/EW. Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}14/ML.20.2.40. Petrol Filter. Will you please take photomicrographs of the attached petrol filter gauges at a magnification of 10. We would like 5 prints of each. Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} | ||