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 rating of bellows for a J III cylinder oil thermostat, plotting extension against load.
| Identifier | ExFiles\Box 39\4\ Scan288 | |
| Date | 12th October 1932 | |
| J III CYLINDER OIL THERMOSTAT. RATING OF BELLOWS. EXTENSION - INS: LOAD - LB: 0.1 0.2 0.3 2 4 6 8 10 MAX: MOVEMENT .250" H.S.731. 12-10-32 | ||