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).
Blueprint diagram of a standard carburettor, labeled as Figure 4.
| Identifier | WestWitteringFiles\Q\February1927-March1927\ 42 | |
| Date | 1st February 1927 guessed | |
| FIG 4. (STANDARD. CARB.) | ||