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).
Two laboratory photomicrographs of a material sample at 10 and 100 diameters magnification.
| Identifier | ExFiles\Box 154a\1\ scan0105 | |
| Date | 29th March 1927 | |
| RR 403 (2½H) (DE 879 29-3-27) G3608 ROLLS-ROYCE LTD. LABORATORY. PHOTOMICROGRAPH No. A602. MAGNIFICATION: 10 DIAMETERS. RR 403 (2½H) (DE 879 29-3-27) G3608 ROLLS-ROYCE LTD. LABORATORY. PHOTOMICROGRAPH No. A603. MAGNIFICATION: 100 DIAMETERS. | ||