132 Conclusions. 1. The men in the Group 20 to 29 years, especially, reflect excellent physical development. The d value for biceps girth is 10.65 compared with 10.32 for a reference military (young) man* (A difference greater than 0.20 is highly significant). 2. By contrast, the women (ages 24.to 39) with the exception of the arn measurements are either physically immature, or they have lost a considerable amount of lean tissue. The striking immaturity is reflected in the girths of hips and thigh. The d values for these measurements are much lower than the comparable d values for a reference woman and for the mean values for a group of American women measured about 1937 - 1939 by the Dept. of Agriculture in connection with garment patterns. is noteworthy. The relatively small size of the calf musculature The d values for arm size compare favorably with those of a reference woman and with those of the USDA (35-39 yr) group. I00b4ts