Since 1903 experiments have been in progress with corn to determine, if possible, those varieties, or rather types, best suited to Massachusetts conditions. With this end in view, the total yield of dry matter per acre, digestibility, the relative proportions and in some cases the composition of the various parts of the plant (stalk, leaf, ear and husk) and the relation of the stage of development to the relative proportion of different parts as effecting the food value have been carefully studied.