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).
Table of data comparing flow rate in pints per hour to manometer gauge level differences in inches.
| Identifier | ExFiles\Box 37\2\ scan 124 | |
| Date | 8th December 1917 | |
| Contd. -2- 8.12.17. Pints per hour. Difference of level in manometer gauge (inches). 240 7.20 235 6.90 230 6.60 225 6.32 220 6.04 215 5.77 210 5.51 205 5.25 200 5.00 195 4.75 190 4.50 185 4.27 180 4.05 175 3.825 170 3.60 165 3.40 160. 3.20 | ||