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).
Viscosity curve graph for Unused Castrolite, plotting temperature against time of efflux.
| Identifier | ExFiles\Box 97\5\ scan0213 | |
| Date | 11th May 1939 | |
| LABORATORY VISCOSITY CURVE UNUSED CASTROLITE TEMPERATURE IN DEGREES CENTIGRADE TIME OF EFFLUX IN SECONDS FROM REDWOOD No. 1 VISCOMETER. | ||