Fahrenheit Scale. Calibration of thermometer by G. 0. Fahrenheit. Range between freezing and boiling points of water is divided into 180 degrees. Zero is temperature of a mixture of snow and salt. Boiling point of water is 212°; freezing point 32°. Having a zero well below freezing point of water, the general readings of air temperature are positive.
Failure to Join. Non-compliance with undertaking to rejoin ship at a specified time. Used as denoting such non-compliance when reason for not rejoining is unknown.