The daily intake of nitrogen during this balance period averaged 8.83 grams, corresponding 55.1grams 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 160 grams, cream 60 grams, sugar 21 grams, bread 69 grams, butter 16 grams.

Lunch

Lamb chop 87 grams, potato croquette 106 grams, tomato 216 grams, bread 66 grams, butter 13 grams, sugar 14 grams, water ice 148 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 60 grams, sugar 21 grams, stewed prunes 247 grams.

Total nitrogen content of the day's food = 8.002 grams.

May 22. Breakfast

Orange 60 grams, oatmeal 207 grams, roll 46 grams, batter 14 grams, coffee 160 grams, cream 160 grams, sugar 36 grams.

Lunch

Boiled potato 160 grams, boiled onions 146 grams, macaroni 180 grams, fried rice 138 grams, syrup 48 grams, ice cream 160 grams, cake 26 grams.

Dinner

Celery soup 160 grams, spinach 100 grams, mashed potato 100 grams, bread 19 grams, coffee 100 grams, cream 60 grams, sugar 7 grams, strawberry short-cake 169 grams.

Total nitrogen content of the day's food = 0.026 grams.

May 23. Breakfast

Sliced banana 201 grams, cream 100 grains, sugar 28 grams, griddle cakes 103 grams, syrup 48 grams.

Lunch

Consommé 160 grams, rice croquette 140 grams, syrup 48 grams, fried potato 100 grams, bread 36 grams, butter 16 grams, apple sauce 00 grams, coffee 76 grams, sugar 7 grams.

Dinner

Vegetable soup 100 grams, bacon 20 grams, potato croquette 60 grams, string beans 120 grams, macaroni 104 grams, bread 26 grams, water ice 184 grams.

Total nitrogen content of the day's food = 8.393 grama.

May 24 Breakfast

Orange 80 grams, fried rice 186 grams, syrup 72 grams, coffee 100 grams, cream 60 grams, sugar 21 grams.

Lunch

Celery soup 126 grams, bread 84 grams, butter 19 grams, boiled onion 127 grams, boiled potato 160 grams, tomato sauce 60 grams, stewed prunes 189 grams, cream 60 grams.

Dinner

Tomato soap 126 grams, bread 21 grams, fried potato 100 grama, spinach 180 grams, cream pie 158 grams, coffee 100 grama, cream 60 grams, sugar 14 grams.

Erening

Ginger ale 260 grams.

Total nitrogen content of the day's food = 7.284 grams.

Here, again, we have dietaries not particularly attractive to every one, but they represent the choice of an individual who was following his own preferences, and like the preceding dietaries they are characterized by simplicity. In any event; they were quite adequate for the wants of the body, and their value to us lies in the proof they afford that a relatively small intake of proteid food will not only bring about and maintain nitrogen equilibrium for many months, and probably indefinitely, but that such a form of diet is equally as effective with vigorous athletes, accustomed to strenuous muscular effort, as with professional men of more sedentary habits. Further, these many months of observation.with different individuals all lead to the opinion that there are no harmful results of any kind produced by a reduction in the amount of proteid food to a level commensurate with the actual needs of the body. Body-weight, health, physical strength, and muscular tone can all be maintained, in partial illustration of which may be offered two photographs of one of the eight athletes taken toward the end of the experiment; pictures which are certainly the antithesis of enfeebled muscular structure, or diminished physical vigor.

STAPLETON Photograph taken in the middle of the experiment, in April.