Although the emotions are recognized as among the most important mental phenomena, exerting a marked influence on other mental processes, they have had comparatively little systematic investigation. We have our casual descriptions of emotions in terms of feelings, sensations and physiological effects. We have our theories, accounting for the expression of the emotions, and our theories of the constituents of the emotive consciousness. The functional side of emotions, emphasizing the behavior of consciousness, has been for the most part neglected. In looking over the literature on emotions, one is impressed by its theoretical and opinionated trend. Much of it is based on casual individual observations. Attention has for the most part been directed to the most intense emotional experiences, neglecting the smaller emotions, important as they are in the behavior of consciousness. Then psychology has concerned itself with the exciting period of the emotion, disregarding the consciousness preceding the emotion and that after the emotion has disappeared. From the functional aspect of emotions, some of the _questions_ which invite study are as follows: 1. the mental situation, including the fore-period from which the emotion develops; 2. the behavior of consciousness during the period the emotion exists; 3. the manner of disappearance and diminution of the emotion; 4. the effect in consciousness after the emotion has disappeared; 5. individual differences in emotional life. The statement of Wundt (21) and Külpe (14) concerning voluntary action, that its mere period of duration is but a small part of its psychological significance, may well be said of emotions. Wundt suggests the close relation between the emotion and volitional action. A volitional process that passes into an external act, he defines as an emotion which closes with a “pantomimetic” movement. Ach (1), in his experiments with the will, distinguishes in each experiment a fore, mid and after period. In our emotional experiences, it is true to a marked degree that we are predisposed and predetermined to a specific emotional excitement by temporary or permanent dispositions and attitudes. METHODS. The method in the present study has been to observe anger introspectively as it appears in every-day life. Ten graduate students of Clark University and two persons outside of the University volunteered to observe their emotions for a period of at least three months and report to the writer each day from the notes of their introspections. These persons were asked to observe all instances of anger and fear no matter how minute. Only anger will be used in the present study. They were asked to observe the conscious fore-period before the emotion begins, the development of the emotion, the disappearance, the diminution and the consciousness after the emotion has disappeared, which is recognized as having been influenced by the emotion.