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).
Test report cover page for C.M. & C.M.1 Morganite brushes on a speedometer.
| Identifier | ExFiles\Box 34\2\ Scan035 | |
| Date | 11th January 1917 guessed | |
| X.2238C. TEST ON C.M. & C.M.1 MORGANITE BRUSHES ON R.R. SPEEDOMETER. COMPLETED. and reported upon by EFC. See X 2543. Brush Experiments | ||