I have more faith in the force of love. I believe that two people convinced that they love each other and desire to live together will talk as frankly of their own health and natures as they do today of the house furnishings and salaries. Their love for each other will protect them from ill health and disease, and prompt them to procure of their own accord, a certificate of health if each has the right information and knowledge. There are, however, different phases of nature, the knowledge of which binds and cements the love of two people, other than venereal diseases, for these diseases are only symptoms of a great social disorder. Every girl should first understand herself; she should know her anatomy, including sex anatomy; she should know the epochs of a normal woman's life, and the unfoldment which each epoch brings; she should know the effect the emotions have on her acts, and finally she should know the fullness and richness of life when crowned by the flower of motherhood. This knowledge I shall endeavor to give in the following articles. Fragmentary the articles must of necessity be, for there are volumes written on each subject. I shall try to free the subjects from technicalities and give the opinions of writers who have made these subjects their life studies and also the facts as I myself have learned them. It is not my intention to thrust upon any one a special code of morals, or to inflict upon the readers my own ideals of morality. I only presume to present the facts for you to accept according to your understanding. The first subject will deal with the girl during the age when sex first manifests itself, in that most fascinating, interesting and puzzling period of a woman's life—the budding period, called girlhood. CHAPTER II. GIRLHOOD—PART I. The Physical Manifestations It has been said that the American girl between the ages of 12 and 18 is the most neglected girl in the world. Just why this is so, it is difficult to say, but I doubt whether she is alone in this neglect, for this is known as the =adolescent period=, and it is only within the last few years that the mental and physiological aspect of this period has been at all considered, or its importance recognized in any part of the world. The =adolescent period= is the time occupied between the ages of 12 and 22, when the physical development comes suddenly into prominence; when the mental faculties become independently active, and the sex of the individual strongly manifests itself. It is a period of the greatest importance to the girl herself, for her physical, mental and moral development during this time will have an important effect on her future life.