late the values for females, as it is very simple, after a little practice, to deduct the ten per cent, by inspection. Possibly these tables may stimulate the use of these formulas so that accumulating data may give Dreyer's work its proper usefulness.It should be borne in mind that, for children below the age of sixteen, the prediction values of Benedict10 and of Benedict and Talbot11 are probably more accurate than the Dreyer formulas. It is for this reason that the accompanying tables do not give values for subjects under sixteen years of age.Summary.-Dreyer's formulas for expected heat production based upon age and weight and for theoretic weight based upon sitting height and chest circumference are reviewed. Values of the formulas for expected heat production are tabulated for males, 16 to 80 years of age and from weights 25 to 125 kilograms.