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).
Cancellation notice for experiment X.3099 on an air pump, superceded by a new horizontal type.
| Identifier | ExFiles\Box 37\4\ scan 104 | |
| Date | 3rd January 1918 | |
| EFC/AT3.1.18. X.3099.-AIR PUMP TO Lec.824. This experiment is now cancelled being superceded by X.3215.-New Horizontal Type Air Pump. E.F.C. EFC. | ||