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).
Notice stating that the petrol venturi meters experiment has been instructed as a production job.
| Identifier | ExFiles\Box 37\2\ scan 135 | |
| Date | 14th March 1918 | |
| EFC/AT14.3.18. X.3180.A/B.-PETROL VENTURI METERS. The above experiment has been instructed as a production job. EFC. | ||