The growth curves of the young of mothers, whose diets consisted of the oat kernel with and without purified food additions, likewise illustrate very well the results observed when similar experiments were conducted with the wheat or maize kernel. They emphasize the fact that, for milk production as well as for growth, the cereals and other seeds may be regarded as closely similar in their properties. It is rendered highly probable, therefore, that the same analogy in reference to value for milk production runs through the series of food-stuffs of this class. From chemical analyses we know that the seeds, tubers and fleshy roots contain inorganic elements in proportions and amounts which, in a general way, place them all in the same class. This is especially true with respect to their low content of calcium, sodium and chlorin, and in a lesser degree of phosphorus. We are, therefore, not to expect that any diet derived solely or nearly so from these classes of foods will prove very satisfactory for the production of milk of good growth-promoting power. The farther the diet falls short of the optimal for milk formation the greater the strain placed upon the lactating organism, because of the tendency to self-sacrifice with respect especially to its inorganic reserves. Under such circumstances these would deviate from the optimal in the body fluids and tissues, and would cause deterioration of the maternal vitality. That such an occurrence is common there can be no room for doubt.