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 opening and closing performance of a Chrysler radiator thermostat.
| Identifier | ExFiles\Box 125\2\ scan0060 | |
| Date | 24th September 1929 guessed | |
| CHRYSLER RADIATOR THERMOSTAT LOAD FROM UNIT REQD. TO OPERATE SHUTTERS MOVEMENT OF THERMOSTAT UNIT INS OPENING CLOSING Axis values: Y: 10, 20 X: 0, .2, .4, .6 | ||