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 from instrument maker Negretti & Zambra regarding vapour pressure type instruments.
| Identifier | ExFiles\Box 40\1\ Scan071 | |
| Date | 12th October 1923 | |
| -3- so delicate as those fitted in the vapour pressure type. NEGRETTI & ZAMBRA, London. 12th October, 1923. [Stamp] RECD 17 OCT '23 ANSD [Watermark] DEVON VALLEY PARCHMENT | ||