Photomicrograph showing the microstructure of a material at 300x magnification.
| Identifier | ExFiles\Box 30\6\ Scan072 | |
| Date | 29th November 1928 | |
| RR 403 (2½H) (DF 568 29-11-28) BM, 2/5733. ROLLS-ROYCE LTD. LABORATORY. PHOTOMICROGRAPH No. A613. MAGNIFICATION : 300 DIAMETERS. | ||
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).