Output. Nitrogen of Nitrogen through Weight of Excrement Food. Kidneys. (dry). May 18 8.119 grams. 5.75 grams. .. grams. 19 9.482 6.64 15 20 10.560 8.45 .. 21 8.992 8.64 .. 22 9.025 8.53 .. 23 8.393 7.69 89 24 7.284 7.34 24 ----- ---- --- 128 grams contain 6.40 % N. 61.855 53.04 + 8.192 grams nitrogen. ------ ----------------- 61.855 grams nitrogen. 61.232 grams nitrogen. Nitrogen balance for seven days = +0.623 gram. Nitrogen balance per day = +0.089 gram. The daily intake of nitrogen during this balance period averaged 8.83 grams, corresponding to 55.1 grams of proteid food. The metabolized nitrogen eliminated through the kidneys averaged 7.58 grams per day, thus showing a daily average metabolism of 47.37 grams of proteid matter. With a body-weight of 63 kilos, this individual was maintaining equilibrium on a metabolism of 0.120 gram of nitrogen per kilo of body-weight. The fuel value of the day’s food as estimated did not exceed 2800 calories, thus substantiating the general statement that there is no need for increasing the fuel value of the food in any attempt to maintain a lower nitrogen level. This particular individual, in his choice of food, unconsciously drifted--as he expressed it--toward a simple vegetable diet, without, however, excluding meat entirely. The following four dietaries will serve to illustrate the character and amount of his daily food: _May 21._ Breakfast.--Banana 106 grams, boiled Indian meal 150 grams, cream 50 grams, sugar 21 grams, bread 59 grams, butter 16 grams. Lunch.--Lamb chop 37 grams, potato croquette 105 grams, tomato 216 grams, bread 55 grams, butter 13 grams, sugar 14 grams, water ice 143 grams. Dinner.--Bean soup 100 grams, bacon 10 grams, fried egg 22 grams, fried potato 100 grams, lettuce salad 63 grams, coffee 100 grams, cream 50 grams, sugar 21 grams, stewed prunes 247 grams. Total nitrogen content of the day’s food = 8.992 grams. _May 22._ Breakfast.--Orange 60 grams, oatmeal 207 grams, roll 46 grams, butter 14 grams, coffee 150 grams, cream 150 grams, sugar 35 grams. Lunch.--Boiled potato 150 grams, boiled onions 145 grams, macaroni 130 grams, fried rice 138 grams, syrup 48 grams, ice cream 160 grams, cake 26 grams. Dinner.--Celery soup 150 grams, spinach 100 grams, mashed potato 100 grams, bread 19 grams, coffee 100 grams, cream 50 grams, sugar 7 grams, strawberry short-cake 169 grams.