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).
Photomicrograph showing a material's microstructure at 150x magnification.
| Identifier | ExFiles\Box 120\1\ scan0331 | |
| Date | 1st October 1935 | |
| R.R. 403 (10H) (92117-1-10-35) J.H., Ltd. ROLLS-ROYCE LTD. LABORATORY. PHOTOMICROGRAPH No. A.1441 MAGNIFICATION: 150 DIAMETERS. M1156. A1440/1. | ||