[CHAPTER XXIII.]

The Production of Movement, [373]

The diffusive wave, [373]. Every sensation produces reflex effects on the whole organism, [374].

[CHAPTER XXIV.]

Instinct, [383]

Its definition, [383]. Instincts not always blind or invariable, [389]. Two principles of non-uniformity in instincts: 1) Their inhibition by habits, [394]; 2) Their transitoriness, [398]. Man has more instincts than any other mammal, [403]. Reflex impulses, [404]. Imitation, [408]. Emulation, [409]. Pugnacity, [409]. Sympathy, [410]. The hunting instinct, [411]. Fear, [415]. Acquisitiveness, [422]. Constructiveness, [426]. Play, [427]. Curiosity, [429]. Sociability and shyness, [430]. Secretiveness, [432]. Cleanliness, [434]. Shame, [435]. Love, [437]. Maternal love, [439].

[CHAPTER XXV.]

The Emotions, [442]

Instinctive reaction and emotional expression shade imperceptibly into each other, [442]. The expression of grief, [443]; of fear, [446]; of hatred, [449]. Emotion is a consequence, not the cause, of the bodily expression, [449]. Difficulty of testing this view, [454]. Objections to it discussed, [456]. The subtler emotions, [468]. No special brain-centres for emotion, [472]. Emotional differences between individuals, [474]. The genesis of the various emotions, [477].

[CHAPTER XXVI.]