The peanut is a legume seed which is not only eaten in considerable quantities at times other than meal-time in the roasted state, but is extensively converted into peanut butter in which form it is eaten with bread. Peanuts are grown extensively in the South for feeding hogs, but if fed too liberally they produce oily pork. To avoid this condition the animals are frequently finished on some other feed before being sent to slaughter.

Daniels and Loughlin (16) have conducted feeding experiments with Spanish peanuts. Their results show that they have the dietary properties common to seeds, and that they have no marked peculiarities. Their greatest deficiencies lie in their mineral content, and in fat-soluble A. Johns and Jones (17) have shown that the proteins of the peanut are unusually rich in lysin.