Oily substances when in good condition are certainly of high value as foods, but should be taken more or less with an eye to the climate, and to the season of the year. When placed on cold bread and eaten along with it they are extremely palatable, and may be taken in reasonable amounts with decided benefit to the whole body. In temperate climates it is generally estimated that about three ounces is a desirable amount for the average adult. In this connection it may not be out of place to mention that the various preparations of cod-liver oil, advertised so freely in the lay press, in some instances actually do not contain a single particle of the substance that they are supposed to be principally composed of; and it may be further stated that there is no good reason to believe that bulk for bulk oils of this kind are in any way superior to those fats commonly eaten. The writer often recalls the saying of a very wise old physician of his acquaintance that "cod-liver oil is nearly as good as butter." _Sugars._--This term includes the large number of different substances of a more or less sweetish taste that belong to the group of carbohydrates. They are closely related to the starches, and it is generally assumed that they play much the same part after being taken into the body. Some of these are of animal and some of vegetable origin--but except the sugar found in milk, the only ones commonly consumed are those derived from cane, beets, and fruits; the sugar from the first two is known as cane sugar or dextrose, and that from the latter as grape sugar or glucose. Like albumins they may be eaten without having been previously cooked, and are unique in that they undergo no chemical change whatever as a result of ordinary degrees of heat. While the consumption of sugars in all civilized nations is rapidly increasing, there can be no question that, irrespective of fruits, they are, of all foods, the most frequent causes of digestive disturbances. It is only within comparatively recent times that mankind has possessed means of separating sugars in any great bulk from the plants containing them, and as a consequence they have only entered prominently into our every-day diet for a relatively short period of time. Before this, it is true, they were consumed to a greater or less extent in various fruits, but the quantity was insignificant as compared with the amount now universally eaten. As a result of this we are now confronted with a new dietetic problem. For ages the human stomach has been accustomed to deal with only small quantities of these substances, and developed accordingly a capacity to digest them proportionate to the amounts then eaten. Now, however, we constantly call upon our digestive organs to deal with large quantities of such foods, and it is not strange that there has been more or less rebellion on their part.