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).
Laboratory report on photomacrographs taken of four different types of petrol filter gauzes.
| Identifier | ExFiles\Box 135\2\ scan0175 | |
| Date | 29th February 1940 | |
| 1138 M.2042. Rm.{William Robotham - Chief Engineer} Hl./EJW. 1/JM.{Mr Morley} 29.2.40. Laboratory. c. Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} Petrol Filter Gauzes. Your ref: Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} 14/ML. 20.2.40. [Handwritten note: 794] As requested we have made photomacrographs at a magnification of 10 diameters of the following gauzes :- M.2042/1. - AC petrol pump filter gauze. M.2042/2. - Stromberg carburetter float chamber filter gauze. M.2042/3. - Wraith carburetter float chamber filter gauze. M.2042/4. - S.U. Carburetter float chamber filter gauze. It was agreed by you that the AC filter gauze should be cut to permit of flattening. Hl./EJW. | ||