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).
Graph showing the approximate viscosity of a sample of compressor oil by plotting temperature against efflux time.
| Identifier | ExFiles\Box 145\1\ scan0076 | |
| Date | 14th May 1926 | |
| Graph showing approximate viscosity of a sample of compressa oil taken from stock 14.5.26. Temperature in °C Time of efflux in Seconds | ||