106.8 grams of proteins × 4 = 427.20 calories of energy 57.97 ” ” fat × 9.4 = 544.94 ” ” ” 398.84 ” ” carbohydrates × 4 = 1595.36 ” ” ” ——————— 2567.51 = the calories of energy required for the average man at light work. TABLE XIII The following gives a balanced supply for a day according to the preceding tabulation: _Amount of Food_ _Calories_ 2 tablespoonfuls fruit with sugar 55 2 eggs 140 1/2 pound lean meat (protein) 243 1 pound bread 1206 1/2 pint soup 307 1 tablespoonful cocoa 135 2 potatoes (average size) 100 1/2 pint of milk 150 2 pats butter (1 cubic inch) 119 2 tablespoonfuls sugar 112 ———— 2567 Dr. Chittenden’s experiments would indicate that a man leading a very active life, and above the average in body weight, can maintain his body in equilibrium indefinitely with a daily intake of thirty-six to forty grams of protein, or albuminoid food, with a total fuel value of 1600 calories. In order to bring oneself to as limited a diet as Professor Chittenden’s men followed, however, it would be necessary to have all food weighed so as to be sure of the correct proportions; otherwise the actual needs would not be supplied and the body would suffer. It is a question whether the men with whom he experimented could have followed so limited a diet for an indefinite period. As stated, however, authorities differ on the amount of food required. Dr. Hall suggests 106 grams of protein Ranke suggests 100 grams of protein Hultgren and Landergren suggest 134 grams of protein Schmidt suggests 105 grams of protein Forster and Moleschott suggest 130 grams of protein Atwater suggests 125 grams of protein A wise provision of Nature enables the body to throw off an excess of food above its needs without injury, within limitations; but, as stated, there is no doubt that the average person exceeds these limits, exhausting the digestive organs and loading the system with more than it can eliminate; the capacity for mental work becomes restricted, and the whole system suffers. * * * * * [Sidenote: Mixed Diet versus a Vegetarian Diet]