Attached chart of top water and air temperatures for the 25-EX car in France.
| Identifier | ExFiles\Box 11\3\ 03-page542 | |
| Date | 22th September 1931 | |
| FOR FILES. 87941. 22.9.31. X.7941. X.7250. Attached chart of top water and air temperatures on 25-EX. car in France. Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} | ||
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).