Prof. T. B. Wood in the November issue of the Journal of the Ministry of Agriculture discussing the known methods of estimating the nutritive values of foodstuffs says, “there is a method which is within the scope of any experimenter and is capable of yielding accurate results of great practical value,” and he goes on to give examples, in the estimating of the nutritive value of swedes, kale, etc., using the results of an experiment which entailed the use of 40 to 120 animals. From these experiments he gets results showing a very satisfactory agreement between experiment and calculation, notwithstanding that there must be a slight experimental error in the calculation of food consumed.