Just such wills are being made daily by the lives and conduct of young people, though they are not put into writing. Some time in the future, however, they will be written into "living epistles, known and read of all men." Other wills are being made daily that through sober, virtuous, youthful lives will bequeath to posterity dowers of health, strength, purity and power. This being true, it seems only a part of prudent foresight to study in youth the law that governs the transmission of personal characteristics to the future "denizens of life's great city." This law is known as Heredity, and its first written record is in the first chapter of Genesis, where it is written that "Every plant and animal shall bring forth after its kind." We are so accustomed to seeing the results of this law that we give it little or no thought. We see that grass springs up each year on our lawns and meadows. We know that if we put the seeds of a certain flower in the ground, that kind of flower will always spring up, never another kind. The farmer is not anxious, after he sows wheat, for fear that the crop will be rye or barley. We expect that the young of cats will be kittens, of geese will be goslings, of men will be human children, and we are never disappointed. The law holds good under all circumstances. We see, too, that there are certain race characteristics that maintain. The Mongolian race has peculiar high cheek-bones, sallow complexions and eyes set in bias, and we recognize the Japanese or Chinese at once, even though dressed in the garb of our country. So, too, we recognize the African or the Caucasian by certain marked characteristics. This transmission of racial traits we call race heredity. Then each race has its own traits, physical or mental, which we recognize as national, and so speak of them. We always mention thrift as an attribute of the Teutonic nations; the Irishman we characterize as witty and pugnacious; the Frenchman as polite; the American as progressive. Each individual has not only his human inheritance, his race inheritance and his national characteristics, but he has also an endowment of family traits.