+-------------+----------+-----------+-------------+----------+ | | Nitrogen | Nitrogen | Nitrogen of | Nitrogen | | | of Food. | of Urine. | Excrement. | Balance. | +-------------+----------+-----------+-------------+----------+ | | grams | grams | grams | grams | | Broyles | 8.66 | 6.63 | 1.87 | +0.16 | | Fritz | 8.13 | 5.77 | 1.63 | +0.73 | | Loewenthal | 8.51 | 6.51 | 2.02 | -0.02 | | Steltz | 8.32 | 6.50 | 1.88 | -0.06 | | Cohn | 8.29 | 6.25 | 1.55 | +0.49 | | Morris | 8.45 | 6.49 | 2.27 | -0.31 | | Oakman | 8.62 | 7.04 | 1.87 | -0.29 | +-------------+----------+-----------+-------------+----------+ A daily intake of 8.5 grams of nitrogen means the consumption of 53 grams of proteid. Under these conditions of diet, the average daily amount of nitrogen metabolized was 6.45 grams, corresponding to 40.3 grams of proteid. The men were practically in a condition of nitrogen equilibrium, so that we are apparently justified in the general statement that the simple dietary followed with these men during the six months’ experiment, and which was accompanied by an average daily metabolism, after the first three weeks, of 7.8 grams of nitrogen, was certainly sufficient to maintain both body-weight and nitrogen equilibrium. Lastly, emphasis may be laid upon the fact that these values for nitrogen do not necessarily represent the minimal proteid requirement of the human body, since it is a well-established physiological principle that by increase of non-nitrogenous food the rate of proteid katabolism can always be further diminished; a principle which is plainly in harmony with the view that a high rate of proteid exchange is not a necessary requisite for the welfare of the body.