Reference to "economical nutrition" in connection with a full measure of recreation needs some explanation. To be economical means to most persons privation of pleasure. It is true that the economic standard attained by Luigi Cornaro had been maintained with ease by the author since the beginning of his experiments in the summer of 1898. This was not accomplished by trying to emulate Cornaro's example, but was reached by a method of taking food, and developed in the course of a special study of the economic natural requirements. The author ate _just what his appetite called for_, as nearly as circumstances of supply permitted, he ate _all that his appetite would allow_; enjoyed a gustatory pleasure that _had never been equalled_ under old habits of taking food, and was a distinct epicurean gainer by the economy learned and practised. But--and in this "but" lies the secret--the solid food had been munched appreciatively until it was liquefied and a strong Swallowing Impulse compelled its deglutition. The sapid and nutritious liquids were tasted as the wine tasters taste wine, as tea tasters taste tea, and as all experts test, or "Get the Good" out of, anything. Instead of being drunk down in a flood like water, which has no taste and no reason to stay in the region of taste, delicious country milk was sipped and tasted with the end of the tongue, where the best taste-buds are, until it disappeared by natural absorption. In this way the milk was fully enjoyed, largely assimilated, and, as the result of almost subsisting on bread and milk alone, at times, in response to the country appetite, the disproportionately excessive waste usually encountered when pursuing a milk-diet was not experienced; the digestion-ash (solid excreta) was extremely small and averaged only about one-tenth of the amount commonly wasted in the digestive process in ordinary habits of taking bread and milk hastily and carelessly. It is significant that, while the quantity of food habitually taken was about one-third of the text-book normal-average prescription, the solid waste was _only a tenth_ of the usual amount, showing a much more economical digestion and a better assimilation. This possibility of a profitable and an agreeable economy was afterwards verified in the Venice experiments. An æsthetic result was attained in connection with these experiments which cannot be too often advertised. All putrid bacterial decomposition was avoided in the process of digestion, and all sense of muscular fatigue was absent, even following strenuous and unusual exercise.