In the vicinity of large towns and cities, where the object is too often to feed for the largest quantity, without reference to quality, an article known as distillers' swill, or still-slop, is extensively used. This, if properly fed in limited quantities, in combination with other and more bulky food, may be a valuable article for the dairyman; but, if given--as it too often is--without the addition of other kinds of food, it soon affects the health and constitution of the animals fed on it. This swill contains a considerable quantity of water, some nitrogenous compounds, and some inorganic matter in the shape of phosphates and alkaline salts found in the different kinds of grain of which it is made up, as Indian corn, wheat, barley, rye, and the like. Where this forms the principal food of milch cows, the milk is of a very poor quality--blue in color, and requiring the addition of coloring substances to make it saleable. It contains, often, less than one per cent. of butter, and seldom over one and three-tenths or one and a half per cent.--while good, saleable milk should contain from three to five per cent. It will not coagulate, it is said, in less than five or six hours; while good milk will invariably coagulate in an hour or less, under the same conditions. Its effect on the system of young children is, therefore, very destructive, causing diseases of various kinds, and, if continued, death. So pernicious have been the consequences resulting from the use of this "swill-milk," as it is called, in the largest city of this country, that the Legislature of the State of New York, at a recent session (1861-2), interfered in behalf of the community by making the sale of the article a penal offence. CULTURE OF GRASSES FOR FODDER. As has been already stated, the grasses in summer, and hay in winter, form the most natural and important food for milch cows; and, whatever other crops come in as additional, these will form the basis of all systems of feeding. The nutritive qualities of the grasses differ widely; and their value as feed for cows will depend, to a considerable extent, on the management of pastures and mowing-lands. Some considerations bearing upon the subject of the proper cultivation of these leading articles of food are, therefore, proposed in this article. [Illustration: PATIENTLY WAITING.]