The following table contains the _résumé_ of two experiments in which a state of complete nutritive equilibrium was maintained by individuals of about the same weight, on widely different quantities of food similar in quality. The subjects of the experiments were a laboratory assistant of Dr. Snyder, of the U. S. Department of Agriculture, and the writer. The experiment of the former was made primarily to show the relative digestibility of the several articles of diet, potatoes, eggs, milk, and cream: ═════════════════════════╤══════════════════════════╤═══════════════ │ Dr. Snyder’s │ │ Experiment. │ Writer’s │ Published in │ Experiment. │ Bulletin 43 │ —————————————————————————┼————─—─—─—─—─—────—─—─—─—─┼─—─—─—───—─—─—─ Age of subject │ 22 years │ 30 years Duration of experiment │ 4⅓ days │ 5 days Number of meals │ 13 │ 10 Weight at beginning │ 62.5 kilos. │ 57.3 kilos. Weight at end │ 62.6 kilos. │ 57.5 kilos. Potatoes (daily average) │ 1587.6 grammes │ 159.4 grammes Eggs (daily average) │ 411.08 grammes │ 124.7 grammes Milk (daily average) │ 710 c.c. │ 710 c.c. Cream (daily average) │ 237 c.c. │ 237 c.c. Daily urine │ 1108 grammes │ 1098 grammes Daily fæces │ 204 grammes │ 18.9 grammes —————————————————————————┴————─—─—─—─—─—────—─—─—─—─┴─—─—─—───—─—─—─ The daily diet of Dr. Snyder’s subject consisted of three and one-half pounds of potatoes, eight eggs, a pint and a half of milk, and half a pint of cream. The writer’s diet of twelve ounces of solid food (like Luigi Cornaro) consisted of three eggs, the remainder of the twelve ounces in potatoes, and an equal quantity of similar liquid food to that taken by Dr. Snyder’s subject. The exercise of the laboratory assistant comprised his daily routine of laboratory work, while that of the writer consisted of six sets of tennis, or an hour and a half on horseback, with an hour to an hour and a half’s walk or climb daily, in addition to much reading and writing. In each case complete nutritive equilibrium was maintained, although the author subsisted on three-seventeenths of the solid food taken by the other subject. Again, cannot one infer that better assimilation and less waste resulted from the better preparation of the smaller quantity of food by insalivation? Surely, too, there must be less daily strain on the intestinal canal, and body generally, in getting rid of 18.9 grammes of inoffensive dry waste, than in getting rid of 204 grammes of humid, decomposing, and offensive matter.