Mechanical Equivalent of Heat 2 : The number of units of work which are equivalent to one unit of heat: 4. 186 joules = 1 calorie. Now recognised simply as the specific heat capacity of water 4. 186kJ/kg
H. J. Porter (Chairman - Technical Committee), Dictionary of Fire Technology, The Institution of Fire Engineers, The Victory Press (Leicester) Ltd. 1979 UK. (Fr Tech - Brit) {81}