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).
Letter to Cambridge Instrument Co. confirming the required specifications for a measuring bridge.
| Identifier | ExFiles\Box 175\4\ img125 | |
| Date | 23th April 1931 | |
| 83987. Expl. Dept. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}2/KT. 23rd April 1931. Cambridge Instrument Co, Ltd. Cambridge. For the attention of Mr. Orchard. Dear Sir, We thank you for your letter of the 22nd, ref. HTG/FB, and confirm that the bridge must read from 0 - 1100C. The lower part of the scale is for measuring the air temperature, which in Winter may be easily as low as 50C. It is immaterial to us to have 20° steps provided we can read accurately to 1/200°. Yours faithfully, For Rolls-Royce Ltd. | ||