club had been in existence during two school years. This is only a sample case of many which have proved that if children are allowed the freedom that developing individuality demands, their mothers must not feel too sure that their darlings are protected against knowledge of life, and perhaps of life in its most degraded aspects. [Sidenote: The vital question for parents.] Here, then, is the fact that every parent should ponder seriously: Normal children are almost certain to get sexual information not later than the early adolescent years, and usually from unreliable and vulgar sources. It is, therefore, not a question whether children of school ages should be taught the important facts of sex, but whether parents and trained teachers rather than playmates and other unreliable persons should be the instructors. Which will parents choose for their own children? Thousands of intelligent parents have already faced this question, and have decided that their children shall have early sex-instruction in home or school or both in order that there will be little danger of vulgar impressions taking a deep hold on child minds. Granted, then, that children should be given some reliable instruction concerning things sexual, who should be the teacher, what should be taught, and when should the instruction be given? These are the fundamental questions now being considered by the parents and educators who have accepted sex-education as necessary. Upon the final answers to such questions the decision of many parents will depend. I shall attempt to answer them in later lectures. [Sidenote: Sex mystery has prevented progress.]