[5] Functions of the Brain, 2nd ed. (1886), p. 386.
[6] Handbuch der Physiologischen Optik, 1st ed. (1867), pp. 600-601.
[7] Le mécanisme de l'attention. Alcan, 1888.
[8] The Expression of the Emotions, 1st ed., (1872), p. 74.
[9] "What is an Emotion?" Mind,1884, p. 189.
[10] Principles of Psychology, 3rd. ed., (1890), Vol. i, p. 482.
[11] The Expression of the Emotions, 1st ed., p. 78.
[12] L'homme et l'intelligence, p. 36.
[13] Ibid. p. 37.
[14] Ibid. p. 43.