most physiologists as necessary for the maintenance of life and strength; and we are certainly justified in the additional statement that if the figures obtained in these experiments truly represent the _minimal_ proteid requirement of the men under observation, then this minimal requirement is quite sufficient to meet the physiological needs of the body for an indefinite period. PHYSICAL CONDITION OF THE MEN. Recalling the fact that this condition of lowered proteid metabolism was maintained for a period of five months, we may next consider the effect of this changed nutritive condition upon the health and strength of the men. The question of body-weight we have already considered. More pertinent is the question, to how great an extent was the strength and bodily vigor of the men modified by the diminished amount of proteid food? The answer to this question is found in the subjoined report from Dr. William G. Anderson, Director of the Yale University Gymnasium. YALE UNIVERSITY GYMNASIUM, NEW HAVEN, CONN., April 6, 1904. To Professor RUSSELL H. CHITTENDEN, _Director of the Sheffield Scientific School, Yale University_, NEW HAVEN, CONN. DEAR SIR,—I hand you herewith a report of the physical training of the squad of soldiers sent by you to the Yale Gymnasium. These men have taken one hour’s exercise daily for six months, Sundays excepted,—October 1, 1903, to April 1, 1904. Before beginning the bodily development of the men we measured each one and took what are known as the American Collegiate Strength Tests. These measurements and tests have been taken twice each month. For details as to measurements and methods of testing the strength of the body, see the “Notes” attached to this report. The members of the squad were called to the floor each morning as soon after nine-thirty as they could don the required suit. For twenty minutes they were put through a series of setting up exercises and body-building movements; then followed exercises on the apparatus, such as bars, rings, ladders, etc. This was followed by a jump or game.