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).
Assessing a sample tube and concluding it is as good as the current material being used.
| Identifier | ExFiles\Box 34\2\ Scan070 | |
| Date | 27th November 1919 | |
| To EFC. from EH. X 2625 EH1/LG27.11.19. With reference to attached, I consider that the sample tube send to us by these people is quite as good as the present material we are using and see no reason why we should not buy tubes from them if the O.O. desire. EH. | ||