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 analysis of thin piston metal used for heat expansion tests.
| Identifier | ExFiles\Box 76\3\ scan0100 | |
| Date | 16th April 1919 guessed | |
| EH. c to Exptl. H16/EB26619. Laboratory. Re(Thin piston) metal used for heat expansion tests. Analysis. Copper 11.3 Zinc .15 Iron .63 Antimony & Tin .15 Manganese Nil HdV | ||