The calibration of two A.R.I.C. distance thermometers.
| Identifier | ExFiles\Box 78\1\ scan0234 | |
| Date | 23th August 1927 | |
| To Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} from Hl. C O P Y. Hll/EA23.8.27. Report No.L930 Re. 2 A.R.I.C. DISTANCE THERMOMETERS SENT IN FOR CALIBRATION 22.8.27. Thermometer reading °C. | Nickel plated dial reading. | All black dial reading. 30 | 34.5 + | 30 40 | 34.5 + | 33.5 50 | 45 | 45 60 | 59.5 | 58.5 70 | 69 | 69 80 | 80 | 80 90 | 90 | 90 100 | 100 | 100 Upon reaching 100°C, the water, in which all 3 were immersed, was boiled for half an hour. The whole was then allowed to cool down, no appreciable difference was in the readings being noticed. The thermometers are returned herewith. + This stationary tendency was confirmed. Hl. | ||
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).