=Children of tobacco users.=--Just as drunkenness may not always manifest itself in a desire for alcohol, but may manifest itself in the form of insanity, idiocy, epilepsy, lasciviousness or criminal tendencies; so, in the children of the inveterate tobacco users the evil effects are often shown in one or more morbid conditions. One has but to study the children of a few excessive users of the weed to be convinced that they do not possess the physical endurance and strength of the fathers. The children of this class of fathers are usually puny, weak and nervous. It is not an easy thing to convince a robust, healthy man that his habit is laying the foundation for constitutional degeneracy in his children and grandchildren. =Where both use tobacco.=--Where the husband and wife both use tobacco the injurious effects on the immediate children are very noticeable. This is because the mother has more hereditary influence over the children than does the father. =Tobacco and degeneracy.=--You cannot always judge of the hereditary effects of bad habits in one generation. In the first generation the effects may not be noticeable. If the bad habits are continued for a few generations the defective descendants multiply. Suppose that a husband and wife are both heavy users of tobacco; that all their children follow their examples and marry companions addicted to the use of tobacco; that their grandchildren all follow the example of their ancestors and marry companions who are inveterate users; and suppose this continued until the fourth generation, who can estimate the resulting degeneracy? It is probable that in many cases degeneracy would be complete and there would be no fifth generation. =Fathers transmit morbid tendencies more to their sons than to their daughters.=--Objectors to acquired characteristics being transmitted often ask why girls as well as boys do not inherit appetites for tobacco and whisky. Many girls are just as conscious of an abnormal appetite for stimulants as their brothers are. More women are addicted to the use of wine and the cigarette than is generally supposed. But for the companionship and protection of mother and a social law that would discard them from society, more would form these habits than do.