V. THE CONNECTION OF BODY WITH MIND--PHYSIOLOGICAL PSYCHOLOGY--MENTAL DISEASES VI. HOW WE EXPERIMENT ON THE MIND--EXPERIMENTAL PSYCHOLOGY VII. SUGGESTION AND HYPNOTISM VIII. THE TRAINING OF THE MIND--EDUCATIONAL PSYCHOLOGY IX. THE INDIVIDUAL MIND AND SOCIETY--SOCIAL PSYCHOLOGY X. THE GENIUS AND HIS ENVIRONMENT XI. LITERATURE * * * * * LIST OF DIAGRAMS. FIGURE 1. Origin of instinct by organic selection 2. Reflex and voluntary circuits 3. Outer surface of the left hemisphere of the brain 4. Inner surface or the right hemisphere of the brain 5. The speech zone (after Collins) 6. Mouth-key 7. Apparatus for optical experiment 8. Memory curves * * * * * THE STORY OF THE MIND CHAPTER I. THE SCIENCE OF THE MIND--PSYCHOLOGY, Psychology is the science of the mind. It aims to find out all about the mind--the whole story--just as the other sciences aim to find out all about the subjects of which they treat--astronomy, of the stars; geology, of the earth; physiology, of the body. And when we wish to trace out the story of the mind, as psychology has done it, we find that there are certain general truths with which we should first acquaint ourselves; truths which the science has been a very long time finding out, but which we can now realize without a great deal of explanation. These general truths, we may say, are preliminary to the story itself; they deal rather with the need of defining, first of all, the subject or topic of which the story is to be told.