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 the crystalline structure of a material.
| Identifier | ExFiles\Box 76\3\ scan0104 | |
| Date | 16th April 1919 guessed | |
| ", | ||