| Fuel value of the food | 3022 calories. |
NITROGEN BALANCE.—G. W. Anderson.
| Nitrogen Taken in. | Output. | ||||||
|---|---|---|---|---|---|---|---|
| Nitrogen in Urine. | Weight of Fæces (dry). | ||||||
| May | 18 | 14.249 | grams. | 8.87 | grams. | ||
| 19 | 9.295 | 8.36 | |||||
| 20 | 13.911 | 9.95 | 12.0 | grams. | |||
| 21 | 10.161 | 8.51 | 46.0 | ||||
| 22 | 9.512 | 6.50 | 39.0 | ||||
| 23 | 11.488 | 6.90 | 67.0 | ||||
| 24 | 12.226 | 8.45 | |||||
| 164.0 | grams contain 6.92% N. | ||||||
| 80.842 | 57.54 | + | 11.349 | grams nitrogen. | |||
| 80.842 | grams nitrogen. | 68.889 | grams nitrogen. | ||||
| Nitrogen balance for seven days | = | +11.953 | grams. |
| Nitrogen balance per day | = | +1.707 | grams. |
Average Intake.
| Calories per day | 3091 |
| Nitrogen per day | 11.55 grams. |
With G. W. Anderson, the balance trial was characterized by an intake of 80.842 grams of nitrogen, with an output for the seven days of 57.54 grams through the urine and 11.349 grams through the fæces, thus making a total excretion of 68.889 grams of nitrogen, and showing a plus balance of 11.953 grams. In other words, the body of this subject, under the conditions prevailing, was storing up nitrogen for future use at the rate of 1.7 grams per day. This also means that a daily intake of 9.8 grams of nitrogen would have been quite sufficient to maintain nitrogen equilibrium, certainly with the large fuel value of the food taken, i. e., 3091 calories per day as the average value.
The average daily excretion of metabolized nitrogen during the balance period amounted to 8.22 grams, while the average daily excretion for the last two months of the experiment was 8.81 grams.