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Published online by Cambridge University Press: 22 November 2017
Armsby (1903) coined the term metabolisable energy, ME, for the gross energy of a diet less the energy in the faeces, urine and methane apparently produced from it. He stated an animal's requirement for ME as the sum of its fasting heat production, FHP, its positive energy retention, ER, and the heat increment, HI. In this paper a general method for predicting HI is proposed and tested.