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 obtain particulars for floating glass hydrometers to measure acid densities.
| Identifier | ExFiles\Box 44\5\ Scan046 | |
| Date | 15th January 1920 | |
| To O.O. from Ck.{Mr Clark} X3741. Ck{Mr Clark}1/AT15.1.20. X.3741.-HYDROMETERS. X.2065. Will you kindly obtain particulars from Messrs.Preston of Barker's Pool, Sheffield, of the floating type, glass Hydrometers suitable for measuring acid densities, the range required being 0 - 70 Twaddle degrees. Ck.{Mr Clark} | ||