Milk is the ideal food. Yet there is no food, however ideal, which can be regarded as universal. There are some people, and not a few, who cannot take milk without suffering from indigestion or biliousness. Even among children one finds this peculiarity at times; if such youngsters are forced to drink it, they are upset in consequence. This is often due to the fact that it is taken raw and undiluted. There is a widely prevalent theory to the effect that any interference with the milk in its natural state deprives it of its nutritive qualities. This is not the case. If the milk is boiled, for instance, a certain substance which it contains, casein by name, undergoes a change. Yet it is this casein which causes the curdling of milk that is prone to take place in many stomachs, producing flatulence, pain, and it may be actual vomiting. This casein is nutritious to those whose digestions can cope with it, but for those who cannot digest it the boiling is of great advantage, as the remaining elements of the milk become more nutritious because more digestible. It is of no use simply to heat the milk, it must be actually brought to the boil. If the taste of it in this form is objected to, this can be overcome by adding a little sugar or salt, or a flavouring of nutmeg. And if the patients do not care for it hot, it may be cooled down and taken cold with or without soda-water. Sour milk, either in the form of ordinary butter-milk or prepared in the scientific manner, is one of the healthiest of drinks. It has been a well-established fact for many years that people living in parts of the country where the drinking of butter-milk is in vogue are exceptionally healthy. This led to the researches which culminated in the sour milk treatment, which came so much to the front a few years ago. It was a valuable discovery, for many of us are so situated that we cannot get butter-milk. Also, the scientific way of preparing it is much cleaner and more satisfactory than the old crude one, which was liable to implant other and less desirable germs in our inside along with the health-giving ones. When this treatment came into vogue we were all to lose our aches and pains, and enjoy robust health or something approaching it. Already, in this short time, the method has fallen almost into disrepute. And simply, so people said, because it did not do what it professed. In this they did it a great injustice. If it did not do what it professed to accomplish it was only because it did not have a chance. If people continue to eat all sorts of unsuitable things and bolt them down, they need not expect to whitewash their insides by taking sour milk on the top of an injudicious diet. Like a good many other adjuncts to health, it has to be taken with a grain, not of salt but of sound common sense. [Sidenote: Sauces.]