Note detailing a four-step heating process with specific temperatures and durations.
| Identifier | ExFiles\Box 164\3\ img108 | |
| Date | 13th January 1938 guessed | |
| 220°F. {Mr Friese} for 2 Hrs. 250°F. {Mr Friese} for 40 mins. 275°F. {Mr Friese} for 20 mins. [Illegible] for 30 mins. BY {R.W. Bailey - Chief Engineer} /RD. | ||
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).