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).
The distillation process, noting temperature, percentage distilled, and distillate appearance.
| Identifier | ExFiles\Box 20\6\ Scan048 | |
| Date | 10th December 1929 | |
| 94.0% distilled over at 195°C 383°F.{Mr Friese} N.B. First 20 ccs.distillate were very cloudy. [Faint watermark text: CROXLEY LION DICKINSON] R.R. 235A (100 T) (S.H. 1768. 10-12-29) Q. 2947 | ||