Basal metabolism data, on a new series of 60 normal individuals, has been obtained under the auspices of the Nutrition Laboratory (series II). These data supplement the work on basal metabolism standards of normal individuals, published by the Nutrition Laboratory in 1919 (Harris and Benedict). The author notes that in general the measurements for basal metabolism are now tending to be lower, which indicates that greater precautions are being taken to secure conditions which will give the lowest comparable values. In this series an effort is made to study the basal metabolism of older men and women than were included in the 1st series. The average age of the men in series II is 34 yrs. as compared with 27 in series I. The range in age is 21-89 yrs. The body weight averages 71.5 kgm. as compared with an average of 64.1 kgm. in the earlier series. The average height is exactly the same as in the previous series. The average heat production for men in series II is 23.5 calories per kgm. of body weight. This is 10% less than that of the men in series I. The heat production per sq. m. of body surface is 891 calories. This is also lower than the heat production per sq. m. of body surface in the 1st series. The women in the 2nd series varied in age from 18 to 58 years, in body weight from 45 to 97 kgm., and in height from 151 to 180 cm. The average age is essentially that of the earlier series. The heat production both per sq. m. of body surface and per kgm. of body weight is lower than in series I. With these subjects, a comparison was made of the actually measured metabolism with the metabolism predicted by the Harris-Benedict, the Aub and DuBois, and the Dreyer standards. With the men the average deviations from these 3 standards respectively are -1.8; -4.4; -0.4; and with the women -4.2; -7.3; and -4.0%. The author believes that the present standards for women should be lowered by 5%.