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).
Calibration chart for a Hobson K.S. Telegauge showing actual liquid level versus scale markings in gallons.
| Identifier | ExFiles\Box 44\2\ Scan054 | |
| Date | 9th March 1927 | |
| x 4038 9-3-27 HOBSON. K.S. TELEGAUGE (10GIII) GALLONS ACTUAL LEVEL OF LIQUID SCALE MARKINGS 14 --- 14 12 --- 12 10 --- 10 8 --- 8 6 --- 6 4 --- 4 2 --- 2 0 --- 0 | ||