In February a more thorough series of observations was made, involving a careful analysis of the daily diet, together with analysis of the excreta, so that not alone the proteid consumption might be ascertained, but likewise the total intake of fats and carbohydrates. The diet consumed was quite simple, and consisted merely of a prepared cereal food, milk, and maple sugar. This diet was taken twice a day for seven days, and was selected by the subject as giving sufficient variety for his needs and quite in accord with his taste. No attempt was made to conform to any given standard of quantity, but the subject took each day such amounts of the above foods as his appetite craved. Each portion taken, however, was carefully weighed in the laboratory, the chemical composition of the food determined, and the fuel value calculated by the usual methods. The following table gives the daily intake of proteids, fats, and carbohydrates for six days, together with the calculated fuel value, and also the nitrogen intake, together with the nitrogen output through the excreta. Many other data were obtained showing diminished excretion of uric acid, ethereal sulphates, phosphoric acid, etc., but they need not be discussed here. ═════════╤════════════════════════════════════════╤═══════════════════ │ Intake │ Output of Nitrogen ├————————┬————-┬——————-┬————————┬————————┼—————┼——————-┼————— │Proteids│Fats │Carbohy│Calories│Nitrogen│Urine│ Fæces │Total ————————-┼————————┼—————┼——————-┼————————┼————————┼————-┼——————-┼————- │ Grams │Grams│ Grams │ │ Grams │Grams│ Grams │Grams Feb. 2 │ 31.3 │25.3 │ 125.4 │ 900 │ 5.02 │5.27 │0.18 │5.45 3 │ 46.8 │40.4 │ 266.2 │ 1690 │ 7.50 │6.24 │0.81* │7.05 4 │ 48.0 │38.1 │ 283.0 │ 1747 │ 7.70 │5.53 │0.81* │6.34 5 │ 50.0 │40.6 │ 269.0 │ 1711 │ 8.00 │6.44 │0.81* │7.25 6 │ 47.0 │41.5 │ 267.0 │ 1737 │ 7.49 │6.83 │0.81* │7.64 7 │ 46.5 │39.8 │ 307.3 │ 1852 │ 7.44 │7.50 │0.17 │7.67 ————————-┼————————┼—————┼——————-┼————————┼————————┼————-┼——————-┼————— Daily Av.│ 44.9 │38.0 │ 253.0 │ 1606 │ 7.19 │6.30 │0.60 │6.90 ═════════╧════════╧═════╧═══════╧════════╧════════╧═════╧═══════╧═════ *Average of the four days.