Influence of Parental Factors upon the Character of their Offspring. What Parental Conditions produce the Best Quality of Children. The Most Favorable Age for Parenthood. What statistics show. The Vaerting Tables. The Influence of Fathers. The Influence of Mothers. The Havelock Ellis Studies and Reports. The Production of Men of Genius. The Investigations of Marro the Italian Scientist. The Redfield Investigation and Theories. The Influence of Parental Age on Genius. How Ability is Transmitted. Why Delayed Parentage produces Better Offspring than Premature Parentage. Latest Discoveries of Sexual Science concerning an important subject 103 LESSON IX--THE DETERMINATION OF SEX How the Sex of Offspring is Determined, and how Controlled or Produced at Will. The Biological Viewpoint. The Practical Viewpoint. The Chromosome Theory. Artificial Influencing of Sex in Offspring. Professor Doncaster's Reports. Dawson's Theory. Are there alternate male and female ova? The Effect of Nutrition in Sex-Determination. Schenk's Theory and Methods. Influencing the Ovum. Male and Female Elements. Yung's Experiments in Sex-Determination, and their Startling Results. Changing Sex in Tadpoles at will. How the Bees determine the sex of their larva. Experiments upon Butterflies. Why more Boys than Girls are born after Great Wars. Other Theories of Sex Determination, and the Methods of Application. The Consensus of the best scientific thought on the subject 115 LESSON X--WHAT BIRTH CONTROL IS, AND IS NOT "Control" not identical with "Prohibition" or "Prevention". Control means "governing, regulating, or managing influences." True Birth Control would not reduce the population of civilized countries, but would increase the same and improve the quality thereof. Not only a normal Birth Rate but also a normal Death Rate. Birth Control not anti-social or immoral, but highly social and highly moral. Misconception due to Ignorance and Prejudice. Unbalanced Idealism and Fanatical Extremists responsible for the mistaken ideas upon the subject of Birth Control. Birth Control Versus Abortion. Higher Phases of Birth Control. The History of Birth Control. The Causes of the present interest in the subject. Nature's tendencies toward Birth Control. How Nature exerts Birth Control in the World. Natural Law and Biological Principles. The High Ideals of true Birth Control 127 LESSON XI--THE FETICH OF THE BIRTH RATE