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 58\1\ Scan185 | |
| Date | 12th October 1932 | |
| J III CYLINDER OIL THERMOSTAT. RATING OF BELLOWS. H.S.731. 12-10-32. MAX: MOVEMENT .250". EXTENSION - INS: 0.1 0.2 0.3. LOAD - LB: 2 4 6 8 10. | ||