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).
Letter requesting confirmation of B. Hopkinson's findings regarding machine speeds.
| Identifier | ExFiles\Box 76\2\ scan0005 | |
| Date | 9th August 1917 guessed | |
| ./. 2. B. Hopkinson has shown that the results are unaffected by all alterations in this rate, we should be glad if you would confirm this, as it is not always quite convenient to arrange for exactly identical speeds of the machines. Yours faithfully, | ||