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 viscosity of Price's Motorine 'C' oil at various temperatures.
| Identifier | ExFiles\Box 144\1\ scan0113 | |
| Date | 24th October 1925 guessed | |
| Graph Showing Viscosity of Price's Motorine 'C' at various temperatures Degrees Centigrade Seconds 100 90 80 70 60 50 40 30 20 10 0 1000 2000 3000 4000 5000 | ||