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).
Request to order two distance thermometers from Messrs. Negretti & Zambra, specifying one should be centigrade.
| Identifier | ExFiles\Box 40\1\ Scan046 | |
| Date | 26th June 1923 | |
| X3695 Roy.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson}1/LG26.6.23. JOHN CROXLEY Please order from Messrs. Negretti & Zambra 2 distance Thermometers of the same type as the one we already have, reading from below freezing to above boiling temperature. We should prefer one of these to be graduated in a centigrade scale, if possible. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||