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 four aluminium cased Aviation Barographs following confirmation of suitable sample sheets.
| Identifier | ExFiles\Box 63\1\ scan0008 | |
| Date | 5th November 1917 | |
| To O.O. from EFC. EFC9/T5.11.17. RE RECORDING BAROGRAPHS. X.3035 With reference to the attached letter and sample Barograph sheets, will you kindly note that these will be quite suitable for our purposes, and that we would like you to order up a 4 aluminium cased Aviation Barograph as quoted for in this letter. EFC. | ||