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 showing the variation of atmospheric pressure and the boiling point of water with altitude.
| Identifier | ExFiles\Box 37\3\ scan 104 | |
| Date | 18th March 1916 | |
| R.R. 225 a (400 T) (S.C. 536. 18-3-16) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1546. X.8176 VARIATION OF ATMOSPHERIC PRESSURE AND BOILING POINT OF WATER WITH ALTITUDE. Altitude (Feet) Air Pressure (%) Boiling Point of Water. (oC) (oF) 0 100.0 100.0 212.0 1,000 96.4 99.0 210.1 2,000 92.9 98.0 208.3 3,000 89.5 96.9 206.6 4,000 86.3 95.9 204.8 5,000 83.1 94.9 203.0 6,000 80.0 93.9 201.1 7,000 77.0 92.8 199.2 8,000 74.2 91.8 197.4 9,000 71.4 90.8 195.4 10,000 68.6 89.8 193.6 11,000 66.0 88.8 191.8 12,000 63.4 87.7 190.0 13,000 60.9 86.6 188.1 14,000 58.6 85.7 186.3 15,000 56.3 84.7 184.5 16,000 54.1 83.6 182.8 17,000 51.9 82.6 180.8 18,000 49.7 81.5 178.9 19,000 47.7 80.5 176.9 20,000 45.7 79.4 174.9 The above Boiling Points correspond to a pressure of 760 mm. of Mercury (14.7 lbs/sq. inch) and a temperature of 15oC (59 oF) at the Earth's Surface. A higher pressure or temperature at the Earth's Surface means slightly higer boiling points and vice versa. | ||