In no branch of human knowledge has there been a more lively increase of the spirit of research during the past few years than in the study of Psychology, Concentration and Mental Discipline. The requests for authentic lessons in Thought Control, Mental Discipline and Concentration have never before been so great as in recent years. Students seeking knowledge in this field have advanced with the fuller possibilities provided by the constant addition of reliable teachings and more data for comparative study. Thousands of students of Concentration have received the reward of diligent, skillful...