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).
Laboratory comparison of readings from a Mercury Thermometer and an Ether Thermometer for a Smith and Yates radiator thermometer.
| Identifier | ExFiles\Box 78\1\ scan0223 | |
| Date | 20th March 1925 guessed | |
| Hs.{Lord Ernest Hives - Chair} H11/EF15524. X3865 Laboratory. Re one Radiator Thermometer-Smith and Yates, Manchester-No.1928. Mercury Thermometer. Ether Thermometer. 67.5 66.0 70.0 69.0 75.0 74.0 78.0 77.0 84.0 83.0 86.0 85.0 93.0 91.5 H1. HC. The lag was not excessive but might explain about 20% of the difference between the two lots of readings. 20% of 1.5° = 0.3° (reduction in relative error in readings) Thermometers retd herewith. | ||