Scott Air-Pak SCBA the freezing point of water at 32 degrees Fahrenheit (0 degrees Celsius) and compare it to 96 °F (35.6 °C; normal human body temperature is 37 °C). While 96 is arithmetically three times 32, the difference in temperature from a scientific point of view is not threefold. Instead of comparing 32 to 96, temperatures of 273.15 K and 308.71 K should be compared. The actual scientifically valid change in temperature from 32 to 96 °F is by a factor of 1.13 (308.71/273.15), not 3. If an air cylinder is pressurized to 4,500 psi at 96 °F and later the temperature
Centigrade 232 another Centigrade 232 poem ("Ode To A Crystal Set") appear on the CD's opening track "Second Degree Soul Sparks". In October 2007, Voiceprint Records re-issued "Centigrade 232" in a package containing both a reprint of the 1977 book and a CD of the 1986 recitations. Voiceprint Records label head Rob Ayling passed a copy of the cassette tape of Calvert's recitations to Dave Brock and asked him to set some of the titles to music. The music was played by the then current line-up of Hawkwind, but some titles were lost at the mixing stage delaying the release until August