(from φύσις , nature, and λόγος, a discourse), the science of the animal constitution, especially in man. This branch of self-knowledge is evidently of the highest temporal importance, and lies at: the basis of the practice of medicine. Modern education has recognised its claims by incorporating it among the common-school studies; and few of the coming generation, it is hoped, will be so ignorant as to labor under the popular delusions and superstitions to.whlich its neglect in former ages has led.