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).
Graph showing the sea level air temperatures required for boiling to occur at different altitudes.
| Identifier | ExFiles\Box 105\1\ scan0211 | |
| Date | 24th March 1934 guessed | |
| CURVES SHOWING SEA LEVEL AIR TEMPS: FOR BOILING. TO TAKE PLACE AT GIVEN ALTITUDE. Y-AXIS: SEA LEVEL AIR TEMP: °C TO BOIL AT GIVEN ALTITUDE. X-AXIS: ALTITUDE IN FEET. Y-AXIS SCALE: 0, 10, 20, 30, 40, 50. X-AXIS SCALE: 0, 2,000, 4,000, 6,000, 8,000, 10,000. | ||