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 plotting Temperature in Degrees Centigrade against Specific Gravity for Wakefield 'Castrol' 'R' oil.
| Identifier | ExFiles\Box 97\5\ scan0224 | |
| Date | 13th March 1930 | |
| [ "LABORATORY", "1/13.3.30", "S.G. GRAPH", "WAKEFIELD 'CASTROL' 'R'", "TEMPERATURE IN DEGREES CENTIGRADE", "SPECIFIC GRAVITY", "100.0", "90.0", "80.0", "70.0", "60.0", "50.0", "40.0", "30.0", "20.0", "10.0", "0", "0.80", "0.90" ], | ||